2003 ADDITIONS ARE LOCATED AT THE END OF THESE REGULATIONS

                                 

                                    STANDING REGULATIONS FOR ALL                                       MOTORSCOOTER COMPETITIONS

                                                      

 

The National Sporting Code of the Auto-Cycle Union, and these BSSO Standing Regulations shall apply to all motor scooter competitions together with any other applicable Standing Regulations and or final instructions.

 

DEFINITIONS 1.01.        Motor scooter.  Except as specially authorised by the A.C.U. or where otherwise defined in more specific Standing Regulations, a motor scooter is a two-wheeled motor vehicle upon which the driver may sit on a seat and have free and open space in front of the seat for passage of his legs, with the following additional characteristics:

(a)  The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250 mm along a line projected forward from the top of the seat and parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth Vertically downwards must not be less than 250 mm. and its base not less than 100 mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature.

(b)  The rim diameter of any road wheel shall not exceed 407 mm. for all engine capacities.

(c)  It must have a starting device. The electrical and lighting equipment, if fitted, must conform to the International Convention of Road Vehicles.

(d)It must have a body and leg shields in the form of an apron, which must have a width, and length of not less than 400 mm. The footrests must be of the platform type and not less than 300 mm. in length and 400 mm. in width overall.

(e)  It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold. An Accountant's Certificate will be required as proof.

(f)   In cases of doubt the matter shall be referred to the Technical Committee.

1.02.        Scootacross.  A race on a cross-country circuit presenting irregularities of surface and terrain.

1.03.        Twisty Sprint.  A race from point to point but not in a straight line, on a metalled surface approximately level and not exceeding one mile in length, between two or more competitors, or individually against time.

1.04.        Road Trial.  A trial in which competitors are required to make their way from place to place, mainly on metalled roads, and in which they may be required to provide evidence of having visited certain parts of the course.

1.05.        Sporting Trial.  A trial in which competitors are required to follow a marked course, which is not confined to, metalled roads.

1.06.        Semi-Sporting Trial.  A competition in which elements of a Road Trial are combined with those of a Sporting Trial.

1.07.        Gymkhana or Social Rally.  A gathering at a place where usually games featuring the use of motor scooters are played in an enclosed arena with the results depending mainly on the skill of the participants.

1.08.        Navigator.  A passenger in a Road Trial or Semi-Sporting Trial.

1.09.        Promoter.  Any person or body proposing to hold, holding or organising a meeting.

 

2.             NOISE CONTROL

 Requirements.  At all competitions held under these Standing Regulations, the requirements for the control of noise is stated in the National Sporting Code, the method for control is specified in the current A.C.U. Handbook.

 

1.   Eligibility. For ALL competitions, entrant’s drivers and passengers must hold the appropriate current Competition Licences issued by the A.C.U. Details of eligibility will be found in the ACU handbook.

2.   Entries. Entry forms, accompanied by the entry fee and insurance premiums, must be complete in every detail, signed by the driver, passenger and entrant (if any) and forwarded to the Secretary of the Meeting. In all competitions, entrants', drivers' and passengers' current Competition Licence numbers must be stated. The statement "applied for" will not be accepted. Details of entry fees and insurance premiums will be stated in the Supplementary Regulations.

3.   Acceptance of Refusal of Entry. Within seven days of the receipt of a completed entry form, or the declared opening date of entries, the promoter must notify each driver of the definite position with regard to their entry and whether such entry has been accepted, or is being held in abeyance or has been refused. Drivers whose entries are held in abeyance, or who are offered reserve positions, may enter another competition on the same day provided they have notified, in writing, the promoter concerned of the withdrawal of their original entry. The closing date of entries, the conditions as to return of entry fees and any other special requirements will be stated in the Supplementary Regulations.

 

 

 

 

 

 

 

 

 

 

 

 

4.Groups.   The basis of the classification of motor scooters shall be the type of motor scooter, coupled

with the engine capacity (total swept cylinder volume of the engine of the motor scooter measured in cubic

centimetres). The type of motor scooter shall be related to its construction in accordance with the

applicable Standing Regulations referred to in the following Regulations.

        

The maximum engine capacities for each class is specified in the table below:

                     Groups - Solo Motor scooters             Groups - Motor scooter Combinations

                                                                                                    Category 1- Group B2

          3     -             up to  160 cc.                            

          4     -             up to  210 cc.                  7          -             up to 260 cc.                                         

          5     -             up to  160 cc.                   8          -             up to 238 cc.                                                                          6     -             up to  260cc.                     9          -             Formula 125 -     up to 125 cc.

        10    -             up to    70 cc.                            

        11    -             up to  125cc.  

        12    -             up to  250cc.               

        13    -             up to  500cc.

                     14    -             up to  650cc.

 

 

5.   Protests. The right of protest and all matters concerned with lodging a protest, to which it shall be addressed, time limits, adjudication and procedures shall be in accordance with the National Sporting Code.

 

6.   Compliance with Regulations.  Every entrant, driver and passenger, by entering or being entered or nominated, thereby acknowledges that he is bound by the National Sporting Code of the A.C.U. and these Standing Regulations together with any Supplementary Regulations, Final Instructions and official instructions to be hereafter issued, to all of which he undertakes to submit, and moreover renounces any right to have recourse to any arbitration or tribunal not provided for in the said Rules and Regulations.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  STANDING REGULATIONS FOR THE CONSTRUCTION OF “AUTOMATIC” SOLO MOTORSCOOTERS FOR USE IN ALL

ROAD RACES, SPRINTS AND HILL CLIMBS  

 

1.   Introduction. These regulations specify the requirements for construction of “Automatic” Class Solo Motor scooters for use in Road Races, Sprints and Hill Climbs as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   Definitions.  An “Automatic” Class Solo Motor scooter is a two-wheeled motor vehicle upon which the driver may sit on a seat and have free and open space in front of the seat for passage of their legs, with the following additional characteristics and exceptions:

(a)  The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250 mm along a line projected forward from the top of the seat and parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth Vertically downwards must not be less than 250 mm. and its base not less than 100mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature.

(b)  The rim diameter of any road wheel shall not exceed 356mm (14 inches).

(c)  It must have a starting device. The electrical and lighting equipment, if fitted, must conform to the International Convention of Road Vehicles.

(d)It must have a body and leg shields in the form of an apron, which must have a width, and length of not less than 400 mm. The footrests must be of the platform type and not less than 250 mm. in length and 300 mm. in width overall.

(e)  It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold. An Accountant's Certificate will be required as proof.

(f)   In cases of doubt the matter shall be referred to the Technical Committee.

(g)  EXCEPTIONS - In the instances of scooter-based machines that do not offer a specific trapezium other characteristics will determine suitability. Those characteristics will be wheel/tyre sizes and engine layout/specification. For 2002 and on, the Gilera Runner series of scooters and the Gilera DNA are acceptable in the specific classes of their engine capacity and are suitable for use in the BSSO Championships.

3. Engine Capacity.  The class limits are set out in these regulations and each machine can be used in a class to suit the capacity of the engine. There are NO lower class limits; therefore smaller class machines may be used in larger capacity classes. Aftermarket performance kits may be used if specifically designed for the engine concerned, as long as it is commercially available to all competitors 

The stroke must remain absolutely as the manufacturer's original specification.

4.   Ignition (stator and flywheel), replacement of by Original or aftermarket manufactures is allowed, on the condition that all parts are commercially available to all competitors.

5.   Seat. The replacement may be made providing no other parts are removed and the original attachments are employed.

6.  Specifications.  The replacement, removal or modification of the following parts of the scooter as listed in points 1 to 10 below, is absolutely forbidden.

ENGINE AND DRIVE UNIT

1    Complete crankcase - except as noted in d below

2    Induction system - the fuel feeding system of the engine must remain absolutely mono - carburettor

3    Automatic clutch which must be working - except as noted in E below

FRAME, WHEELS and BODYWORK

4    Frame (complete carrying structure)

5    Wheel Rims (front and rear, sizes and materials)

6    Handlebars (position, height, width)

7    Petrol tank

8    External body assembly (plastic parts included) - (with the exceptions to allow cooling for engine unit)

9    Mudguards (front and rear) - (where fitted from new)

10  Connections and working system of the rear shock absorber

Modifications may be made to other parts of the motor scooter, subject to the following restrictions:

(a)    The system of introducing fuel into the engine must be as used by the original engine unit.

Where the original system is by Fuel Injection (aka Aprilia Di-Tech), it is allowed to convert to a carburettor system. In all Automatic classes there are no restrictions on the maximum size of carb that can be used.

 

 

 

 

 

 

 

 

 

 

 

       

(b)  MAGNETO: the magneto of the ignition can be of a type without an RPM limit-switch; the use of variable advance type is permitted.                                                                                 

(c)  EXHAUST PORTS; the use of a shutter valve (power valve) on the exhaust port is forbidden.

(d)CRANKCASE: the removal of some material is allowed whereas the addition of any material in forbidden.

(e)  CLUTCH: the replacement of the springs and of the friction material is permitted and original or aftermarket equipment may be fitted as long as it is commercially available to all competitors. It is also allowed to lighten or to modify the clutch set.

(e) EXHAUST SYSTEMS: The exhaust system need not necessarily be the original one but it must fulfil all the current A.C.U. requirements concerning noise control. The system must be constructed in a manner not prejudicial to the safety of the driver, any other competitor or official, and be mounted in a safe manner. Exhaust fumes must not be discharged in a manner as to raise dust, foul the tyres or brakes or inconvenience any other driver. The furthest extremity of any exhaust pipe must not project beyond any part of the machine or its bodywork; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

(f)   FLYWHEEL COVER: removal is forbidden; however it is possible to modify it to improve the engine cooling system. You may replace it with an aftermarket part as long as it is commercially available to all competitors.

(g)VARIATOR COVER: the modification of this component is allowed in order to improve the cooling of the variator, unless such a modification exists on the original part or on a component of the manufacturer of the vehicle. You may replace it with an aftermarket part as long as it is commercially available to all competitors.

(h)CLUTCH COVER: the modification of this component is allowed in order to improve the cooling of the clutch set. You may replace it with an aftermarket part as long as it is commercially available to all competitors.

(i)                ENGINE COOLING: an improvement of the engine cooling is allowed unless it changes the original system (liquid or air-cooled); the use of both of these systems at the same time is forbidden.

(j)    REPLACEABLE PARTS: all replaceable parts (apart from the exhaust system) must not be unique (prototype) parts; they must be mass-production items and must be found in the manufacturers catalogues.

(k)   In all instances all alterations must be made with safety in mind. If any such alteration is deemed dangerous then steps must be taken to alter the modifications to a safe state.

7.  Weight. The total weight of the vehicle (including fuel) must not be less that 65 Kg.

8.   Inclination. It must be possible for the motor scooter, not being loaded, to be inclined to an angle of 26º from the vertical without any part of it, other than the tyres, coming into contact with the ground.

9.   Projections. There shall be as few sharp projections as possible.  Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver.  All tubular ends must be securely fitted with rounded ends. ALL RACKS, SPARE WHEELS, PROP-STANDS, CRASH BARS AND MIRRORS MUST BE REMOVED.

10.           Glass/Plastic Lenses. All glass or plastic in lights and on instruments must be securely taped to retain it in place in the event of breakage.  Speedo and rev counter faces should be covered with transparent plastic sheet or tape.

11.           Fuel. Will be a maximum of a 100 ll octane.

 No additives other than normal lubricants are permitted. The use of power boosters and/or octane boosters is specifically prohibited.

12.           Fuel Feed Taps. If a manual fuel feed tap is used, then it must be prominently marked to indicate the "OFF" position.

13.Oil Drain/Filler Plugs. All oil drain, level and filler plugs must be tight and drilled and wired in position.

14.           Tyres. Only commercially available moulded treaded tyres of good quality designed and manufactured as suitable for use on the wheel rims of the vehicle will be permitted. At pre-competition scrutineering all tyres must have a minimum depth of tread of 1.6mm across the entire original tread area. The use of Agricultural, Industrial, "Slick" and recut moulded tyres is prohibited.

15. Brakes. The standard braking system must consist of two efficient brakes operated independently, one on each of the two road wheels. The brake disc, pads and caliper, may be replaced with alternative aftermarket items specifically designed for the machine in question, as long as the items concerned are commercially available to all competitors

16.           Ignition Switches and Battery. All vehicles must be fitted with an easily accessible ignition switch/key which must be prominently marked to indicate the "OFF" position in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa. Batteries, if fitted, must be of the leak-proof type.

17. Throttle Controls. Throttle controls must be self-closing when not held by the hand.

18. Date of Operation. These Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF CLASSIC

(GROUP 8) MOTORSCOOTER COMBINATIONS   FOR USE IN ALL ROAD RACES, SPRINTS AND HILL CLIMBS

 

 

1. Introduction. These Regulations specify the requirements for construction of Classic Motor scooter Combinations for use in Road Races, Sprints and Hill Climbs as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2. General. The sidecar must be placed on the left side of the motor scooter and the three road wheels must be disposed to give two tracks. 

Hinged sidecars and steerable sidecar wheels are forbidden.

Neither the driver nor the passenger may be attached to the machine.

The passenger exit can be in front of or behind the sidecar wheel, whichever is preferred.

THE SPIRIT OF THESE REGULATIONS WILL BE ADHERED TO AT ALL TIMES

3. Construction. The chassis must incorporate, as an integral part, the complete Lambretta spine frame including engine mountings.

The remainder of the chassis must be constructed of good quality seamless drawn steel tube of a circular or non-circular section, welded together.

The use of electrode metal arc welding is not recommended.

Reinforcement of the steering head is allowed to a maximum of 230mm from the centre line of the steering head.

The use of composite construction is forbidden with the exception of the sidecar platform. (i.e. Aluminium or carbon fibre skinned honeycomb).

The use of TITANIUM and similar "exotic" metals is forbidden in the construction of the chassis, front forks, handlebars and wheel spindles. The use of light alloys is forbidden for wheel spindles.

4. Dimensions.

Weight:                  The MINIMUM weight, without fuel, shall be 130 kg. The use of ballast to reach this weight is forbidden.

Width:                    The overall MAXIMUM shall be 1520mm.

Wheelbase:           The MAXIMUM shall be 1650mm.

Track:                     The MINIMUM shall be 760mm. The distance is measured from the centre of the track left by the rear wheel to the centre of the track left by the sidecar wheel.

Ground Clearance:   The MIMIMUM clear space to be maintained beneath the entire under surface of the machine when loaded with fuel, driver and passenger is 65mm.

5. Streamlining and Bodywork. The streamlining must be easily detachable for scrutineering and be so designed and fitted to allow complete liberty of movement to the driver and passenger when the vehicle is in motion and when getting on and off the vehicle, without any part of it having to be displaced.

Aerofoils or spoilers are not permitted.

Rear view mirrors are forbidden.

A solid and effective protection must be fitted between the driver and the engine and must prevent direct contact between the driver's body or clothing and escaping flames or leaking fuel or oil.

Any type of seating may be used provided it is properly padded and securely fitted in place.

The extreme forward part of the streamlining must not project forward in plan beyond the most forward part of the front tyre by more than 400mm.

The extreme rearward part of the streamlining must not project rearward in plan beyond the most rearward part of the rear tyre by more than 400mm.

Whatever the position of the handlebars, there must be a clear space of at least 25mm between the streamlining and the extremities of the handlebars, including any attachments thereto, and a clear space of at least 20mm between the streamlining and any other part of the steering mechanism or front wheel.

6. Projections. There shall be as few sharp projections as possible. Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver and passenger. All tubular ends must be securely fitted with rounded ends.

Drive chains must be guarded from sprocket to sprocket.

                                                                                                                                                                                                               

 

 

 

 

 

 

 

 

 

 

7. Air Intakes. Cooling air intakes must be so constructed that there is NO forward projection/protrusion to catch or foul in the event of an accident.

motor scooter and the drive must be transmitted to the road through the hub and rear wheel of the

 8. Engine and Drive Units. The engine and drive unit must have originated from a Lambretta

motor scooter. The unit shall be properly and safely finished with all necessary studs, nuts, bolts and washers securely fitted. There shall be no evidence of oil leaks.

      The MAXIMUM PERMITTED bore is 70mm.

      The MAXIMUM PERMITTED stroke is 60mm.

Any modifications made must not prejudice the safety of the driver, any other competitor or official and must be within the following parameters for the parts specified:

CYLINDER HEAD - Liquid cooling is not permitted.

CYLINDER BARREL - Cylinder barrel must be as manufacturer's original specification or a TS1 kit           barrel.

PORTS - Ports may be enlarged, but they may not be bridged nor the cylinder barrel slotted.  The position may not be changed, additional ports may not be provided, and the provision of additional material on either the inside or the outside of the barrel is prohibited.

PACKING PIECES - The total thickness of any packing piece(s) or gasket(s) used between the base of the cylinder and the crankcase must not exceed 10mm.  Packing pieces may not be used as a means of increasing the available port area.

CRANKCASE - Crank casing must be as manufacturer's original specification, except that:

(a)  Modifications may be made to permit the use of a larger section tyre subject to the limitations in Regulation 18 below.

(b)  Modifications may be made to any existing crankcase porting except that the provision of additional material on either the inside or the outside of the casing is prohibited.

(c)  Notwithstanding the exception in B above, the provision of additional material to effect genuine repairs to a crankcase will be permitted provided that the final dimensions and appearance do not exceed the manufacturer's original specification.

CRANKSHAFT - The crankshaft must be a commercially available type designed to fit a Lambretta motor scooter with a MAXIMUM permitted stroke of 60mm and shall remain as manufacturer's original specification, except that:

(a)  The ignition mounting may be altered.

(b)  The crankshaft may be "padded".

GEARCASE - The gearcase must be as manufacturer's original specification except that a spacer maybe used to facilitate the use of extra clutch plates.

GEARBOX - The gearbox must be as manufacturer's original specification for the engine type, except that the original gear cluster may be altered to provide alternative ratios. The number of ratios must remain unchanged.

NOTE: For the purposes of this Regulation, the 'engine' is deemed to comprise the cylinder barrel(s), crankcase and all internal components within these units.

9. Engine Position. The engine unit must be in the original position.

10.Induction Systems. The engine shall be normally aspirated.

11.Fuel. Fuel will be a maximum of a 100 ll octane.  The use of power boosters and/or octane boosters is specifically prohibited.

12.Exhaust Systems. The exhaust systems must fulfil all the current A.C.U. requirements concerning noise control.  The systems must be constructed in a manner not prejudicial to the safety of the driver, the passenger, or any other competitor or official. Exhaust fumes must not be discharged so as to raise dust, foul the tyres or brakes or inconvenience a passenger or any other driver. The furthest extremity of any exhaust system must not project beyond any part of the machine or its bodywork or streamlining; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

13.Fuel Tank. The fuel tank(s) must be soundly constructed, entirely of metal, with a securely fitted filler cap, and sufficiently independently protected from the ground. The fuel filler cap must be fitted in such a way that it does not protrude from the fairing and cannot be torn off in an accident.

A fuel feed tap must be fitted in an easily accessible position and be prominently marked to indicate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the "OFF" position in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa. 

Any fuel tank breather pipe must be fitted with a non-return valve and must discharge into a leak-proof catch tank having a minimum capacity of 500 ml, which must be empty at scrutineering. All fuel pipes must be adequately secured.

14.Oil Drain/Filler Plugs and Catch Tanks. All oil drain level and filler plugs must be tight and drilled

and wired in position. Any oil breather pipe fitted must discharge into a catch tank mounted in an easily accessible position and having a minimum capacity of 500 ml. The catch tank must be empty at scrutineering.

15. Steering. Steering shall be through the front wheel only by means of handlebars firmly secured to steering members turning the front wheel and its supports directly with no intermediate push or pull rods.

Hub centre steering, remote steering linkages and the use of articulated joints in the steering mechanism are excluded. By definition an articulated joint is one allowing movement in more than one plane.

Handlebars and all steering bearings must be located on the sprung portion of the front suspension. The extreme width of the handlebars must be not less than 450mm.

The minimum angle of rotation of the handlebars, each side of a straight ahead position and measured horizontally at ground level, is to be 30º and stops must be fitted in order to limit angular movement to 65º and to allow a minimum of 25mm clearance between the handlebars and any tank, similar attachments or streamlining.

Whatever the position of the handlebars and suspension no part of the front wheel or forks must pass within 20mm of any bodywork or streamlining.

It is permissible to displace the steering head up to a maximum of 75mm determined by measuring the offset from the centre line of the rear wheel.

16. Wheels and Tyres. All wheels must be of metal construction and be within an allowance of 5º from the vertical.

The diameter of the front and sidecar wheels MUST be 10 inches and the tyres thereon have a MAXIMUM section of 5J.  The diameter of the rear wheel MUST be 10 inches with a wider section standard pattern rim permissible and allowing a MAXIMUM  tyre size of 10 inches by 4.00.

At pre-competition scrutineering ALL tyres must have moulded treads and must have a minimum depth of tread of 1.6mm across the entire original tread area. Recut moulded tyres are not permitted.

18. Front Suspension. The front suspension is to be either a leading or trailing fork, or links, with the wheel equally supported on each side. Wishbones are not permitted.

17. Rear Suspension.  Rear suspension is not permitted.

18. Brakes. The braking system must consist of at least two brakes operated independently on the front and rear road wheels, each giving complete control. Braking of the sidecar wheel is optional.

19. Mudguards and Wheel Protection. The rear wheel mudguard must cover at least 240 degrees of the rear wheel. The side nearest to the sidecar wheel must be enclosed. The sidecar wheel must be enclosed from the sidecar platform and level with the sidecar platform around the periphery.  For rear exit sidecars the sidecar wheel must be totally enclosed down to platform level.

20.Driver. The driver in the normal driving position must be completely visible, with the exception of his forearms and lower legs, from the side opposite to the sidecar and from above. It is forbidden for the driver's legs to be enclosed.

The driver's position must be such that the driver's feet are positioned behind the knees when viewed from above and the footrests so designed and positioned that easy access is always available to any control pedal.

21. Passenger. The passenger must be able to lean out to either side of the sidecar. For this purpose the vehicle must be fitted with suitable handholds, which must be of the "closed loop" type.

22.Electrical Systems and Battery. All vehicles must be fitted with an easily accessible ignition switch, mounted in the vicinity of the handlebar/headset and within a radius of 200mm of the centre line of the top of the fork stem.  Switches must be of a positive locking type in both the on and off positions and when in the "OFF" position must not allow the engine to run.  The "OFF" position of all switches must be prominently marked in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa.

Any electric fuel feed pump must be wired in such a way as to cut out when the ignition switch is in the “OFF” position.

Batteries, if fitted, must be of the leak-proof type, securely mounted and it is strongly recommended that the battery be insulated in foam rubber                                                                                               

 

24.Control Levers. All handlebar levers must be ball ended, the ball to be at least 19mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the

 handlebar.

 

25.Date of Operation. These Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The following information does not form part of the Standing Regulations but is provided as a quick guide to the requirements of the S.R.'s.

 

It is hoped, by the promoters of this class, that this limited specification will enable close racing at an affordable cost.  For the benefit of all who compete in the class, cheating will not be tolerated.

1.   Complete Lambretta spine frame.

2.   Engine in original position driving the rear wheel.

3.   Lambretta cast iron or TS1 barrel.

4.   No water-cooling for head or barrel.

5.   Porting to Standard class specification, i.e. no bridged ports or extra ports.

6.   Maximum stroke 60mm.    Maximum bore 70mm.

7.   No 'alloy' welding of barrels.

8.   Passenger exit can be in front of or behind the sidecar wheel, whichever is preferred.

9.   The use of titanium or similar 'exotic' material is forbidden.

10.Treaded tyres only at all times.

11.Front and sidecar wheels 10 x 5J maximum.

12.Rear wheel must be standard pattern rim or wide version with 4.00 x 10 maximum scooter tyre.

13.Maximum chassis dimensions - wheelbase 1650mm - width 1520mm.  Track - minimum 760mm. Ground clearance when fully loaded - 65mm.

14.Centre hub steering and sidecar wheel steering is forbidden.

15.Independently operated brakes on front and rear wheels - sidecar brake is optional.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF (GROUP 7)

MOTORSCOOTER COMBINATIONS FOR USE IN ALL ROAD RACES, SPRINTS AND HILL CLIMBS

 

1.   Introduction. These Regulations specify the requirements for construction of Motor scooter Combinations for use in Road Races, Sprints and Hill Climbs as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   General. The sidecar must be placed on the left side of the motor scooter and the three road wheels must be disposed to give two tracks.

Hinged sidecars and steerable sidecar wheels are forbidden.

Neither the driver nor the passenger may be attached to the machine.

3.   Construction. The frame must employ as part of its construction, the original type of engine fixing into the chassis giving effective support to the engine.  as defined in Regulation 1.01. of the Standing Regulations for All Motor scooter Competitions.

The remainder of the frame must be constructed of good quality seamless drawn steel tube of a circular or non-circular section, welded or brazed together. If circular, the outside diameter shall not exceed 100mm, if non-circular, the maximum cross section shall not exceed 100mm measured at right angles to any flat face.

The above does not restrict the swinging arm.

Reinforcement of the steering head is allowed to a maximum of 230mm from the centre line of the steering head.

Monocoque construction is forbidden.

The use of composite construction is forbidden with the exception of the sidecar platform. (i.e. Aluminium or carbon fibre skinned honeycomb).

The use of TITANIUM and similar "exotic" metals is forbidden in the construction of the frame, front forks, handlebars, swinging arm and wheel spindles. The use of light alloys is forbidden for wheel spindles.

The use of electrode metal arc welding is not recommended.

4.   Dimensions

Weight:                  The MINIMUM weight, without fuel, shall be 130kg. The use of ballast to reach this weight is forbidden. 

Width:                    The overall MAXIMUM shall be 1700mm.

Wheelbase:           The MAXIMUM shall be 1650mm.

Track:                     The MINIMUM shall be 760mm. The distance is measured from the centre of the track left by the rear wheel to the centre of the track left by the sidecar wheel.

Ground Clearance:  The MIMIMUM clear space to be maintained beneath the entire under surface of the machine when loaded with fuel, driver and passenger is 65mm.

5.   Streamlining and Bodywork. The streamlining must be easily detachable for scrutineering and be so designed and fitted to allow complete liberty of movement to the driver and passenger when the vehicle is in motion and when getting on and off the vehicle, without any part of it having to be displaced.

Aerofoils or spoilers are not permitted.

Rear view mirrors are forbidden.

A solid and effective protection must be fitted between the driver and the engine and must prevent direct contact between the driver's body or clothing and escaping flames or leaking fuel or oil.

Any type of seating may be used provided it is properly padded and securely fitted in place.

The extreme forward part of the streamlining must not project forward in plan beyond the most forward part of the front tyre by more than 400mm.

The extreme rearward part of the streamlining must not project rearward in plan beyond the most rearward part of the rear tyre by more than 400mm.

Whatever the position of the handlebars, there must be a clear space of at least 20mm between the streamlining and the extremities of the handlebars, including any attachments thereto, and a clear space of at least 20mm between the streamlining and any other part of the steering mechanism or front wheel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6.   Projections. There shall be as few sharp projections as possible.  Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver and passenger. All tubular ends must be securely fitted with rounded ends.

7.   Drive Guard. An adequate guard must be fitted to prevent the drive being accidentally touched. Drive chains must be guarded from sprocket to sprocket.

8.   Glass. All glass in lights and on instruments must be securely taped to retain it in place in the event of breakage.

9.   Air Intakes. Cooling air intakes must be so constructed that there is NO forward projection/protrusion to catch or foul in the event of an accident.

10.Engine and Drive Units. The engine and drive unit must have originated from a motor scooter and the drive must be transmitted to the road through the rear wheel of the motor scooter. The unit shall be properly and safely finished with all necessary studs, nuts, bolts and washers securely fitted. There shall be no evidence of oil leaks. THE MAXIMUM PERMITTED ENGINE CAPACITY IS 260 cc.

Any modifications made must not prejudice the safety of the driver, any other competitor or official and must be within the following parameters for the parts specified:

CYLINDER BARREL(s) and CRANKCASE -

(a)  In regard to shape, size, configuration, position and number of ports, and external appearance, materials and method of manufacture, the cylinder barrel(s) must have originally conformed to the manufacturer's original specification (though not necessarily produced by the original manufacturer) or be included in the A.C.U. list of approved kit barrels.

(b)  The bore size of a cylinder may be increased by no more than 10mm.

(c)  The cylinder used must have been originally designed for the engine type, must retain the original method and position of fitting and both the cylinder and the crankcase must retain the centres of the original stud holes used for bolting the cylinder to the crankcase.  It must therefore be possible, with the exception of interference from a modified cylinder spigot, to fit the cylinder to a standard crank casing as produced by the original manufacturer of the engine unit used.

(d)The crankcase to cylinder gasket face must be parallel to that of the original crankcase.

(e)  The crank casing must retain the original mounting points for support within the frame and the principal external dimensions must remain as manufacturer's original specification.

(f)   Any modification to the crank casing to permit usage of modified original type crankshaft assemblies will not be permitted if the modification is so extensive as to preclude the fitting of the standard crankshaft as produced by the original manufacturer of the engine unit used.

(g)Modifications may be made to facilitate the use of water-cooling but the engine must comprise a single unit.

(h)Liquid cooling, or any other modification, to the cylinder will not be permitted if the modification is so extensive as to preclude identification of the origin of the cylinder.

GEARCASE / GEARBOX - The gearcase must be basically as the manufacturer's original specification. Modifications may be made to the number of drive ratios, the ratios themselves and to the gears. Alterations to the gear casing will not be permitted if the modification is so extensive as to preclude the fitting of a standard gear set as produced by the original manufacturer of the engine unit used.

NOTE: For the purposes of this Regulation, the 'engine' is deemed to comprise the cylinder barrel(s), crankcase and all internal components within these units.

11.Engine Position. The engine must be positioned behind the steering head and in front of the rear wheel and be so located that the centre line of the engine (by definition, a position midway between the centre lines of outermost cylinders) is no more than 160mm from the centre line of the rear wheel of the motor scooter.

12.Induction Systems. Any form of induction system may be used with the exception of forced induction (see 13 below), which is prohibited.

13.Forced Induction. An engine shall be considered as having Forced Induction when in respect of one engine cycle, the total volume of gaseous mixture induced exceeds the capacity, measured geometrically, of the engine working cylinder(s). The intra-cylinder injection of fuel shall not be considered as forced induction.

14.Fuel.  Fuel will be a maximum of a 100 ll octane. The use of power boosters and/or octane boosters is specifically prohibited.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.Exhaust Systems. The exhaust systems must fulfil all the current A.C.U. requirements concerning noise control. The systems must be constructed in a manner not prejudicial to the safety of the driver, the passenger, or any other competitor or official. Exhaust fumes must not be discharged so as to raise dust, foul the tyres or brakes or inconvenience a passenger or any other driver. 10

The furthest extremity of any exhaust system must not project beyond any part of the machine or its bodywork or streamlining; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

16.Fuel Tank. The fuel tank(s) must be soundly constructed, entirely of metal, with a securely fitted filler cap, and sufficiently independently protected from the ground. The fuel filler cap must be fitted in such a way that it does not protrude from the fairing and cannot be torn off in an accident.

A fuel feed tap must be fitted in an easily accessible position and be prominently marked to indicate the "OFF" position.

Any fuel tank breather pipe must be fitted with a non-return valve and must discharge into a leak-proof catch tank having a minimum capacity of 500 ml, which must be empty at scrutineering. All fuel pipes must be adequately secured.

17.Oil Drain/Filler Plugs and Catch Tanks. All oil drain, level and filler plugs must be tight and drilled and wired in position. Any oil breather pipe fitted must discharge into a catch tank mounted in an easily accessible position and having a minimum capacity of 500 ml. The catch tank must be empty at scrutineering.

18.Steering. Steering shall be through the front wheel only by means of handlebars firmly secured to steering members turning the front wheel and its supports directly with no intermediate push or pull rods.

Hub centre steering, remote steering linkages and the use of articulated joints in the steering mechanism are excluded. By definition an articulated joint is one allowing movement in more than one plane.

Handlebars and all steering bearings must be located on the sprung portion of the front suspension. The extreme width of the handlebars must be not less than 450mm.

The minimum angle of rotation of the handlebars, each side of a straight ahead position and measured horizontally at ground level, is to be 30º and stops must be fitted in order to limit angular movement to 65º and to allow a minimum of 20mm clearance between the handlebars and any tank, similar attachments or streamlining.

Whatever the position of the handlebars and suspension no part of the front wheel or forks must pass within 20mm of any bodywork or streamlining.

It is permissible to displace the steering head up to a maximum of 75mm determined by measuring the offset from the centre line of the rear wheel.

19.Wheels and Tyres. All wheels must be of metal construction and be within an allowance of 5º from the vertical.

The diameter of any fully inflated tyre, measured over the outside of the tyre, shall be NOT LESS THAN 407mm and NOT MORE THAN 560mm.

At pre-competition scrutineering ALL moulded tread tyres must have a minimum depth of tread of 1.6mm across the entire original tread area.  Recut moulded tyres are not permitted.

SLICK TYRES

When conditions permit, slick (untreaded) tyres may be used and these may be professionally grooved. The surface of the slick tyre must contain three or more hollows at 120-degree intervals or less, indicating the limit of wear on the centre and shoulder areas of the tyre. When at least two of these indicator hollows become worn on different parts of the periphery, the tyre must no longer be used.

INTERMEDIATE PATTERN TYRES

For wet weather conditions which call for a "TREADED" tyre other than a full "WET" tyre, an

"INTERMEDIATE" pattern tyre must be used. The tyre pattern must be professionally cut and consist of a minimum of three circumferential grooves each 0.18 inches in width.

NOTE: At pre-competition scrutineering the surface of the tyre must contain three or more hollow "WEAR" indicators at 120 degree intervals indicating the limit of wear across the tread area.

One groove must be cut in the centre of the tread area, with the remaining grooves located equi-distant between the centre groove and the edge of the tread area.

In addition to the circumferential groove, "SLITS" across the tread area must be cut from each groove, 0.18 inches in width, 0.4 inches minimum in length. Spacing must be equi-distant around the periphery of the tyre and no more than 3 inches apart.

To give inter groove relationship between the "SLITS"; their position must be staggered.                                                                                                                                                                                                                               

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The margin of tyre surface between the ends of the opposed "SLITS" must be no greater than 0.60 inches.

See FIGURE 1 for example calculation and a diagrammatic explanation of the above dimensions.

20. Front Suspensions. The front suspension is to be either a leading or trailing fork, or links, with the wheel equally supported on each side. Wishbones are not permitted.            

21.Rear Suspension. The rear suspension, if fitted, is to be of the swinging arm type. A single sided swinging arm is allowed.

22.Brakes. The braking system must consist of at least two brakes operated independently on the front and rear road wheels, each giving complete control. Braking of the sidecar wheel is optional.

23.Mudguards and Wheel Protection. The rear wheel mudguard must cover at least 240 degrees of the rear wheel. The side nearest to the sidecar wheel must be enclosed. The sidecar wheel must be enclosed from the sidecar platform and level with the sidecar platform around the periphery.  For rear exit sidecars the sidecar wheel must be totally enclosed down to platform level.

24.Driver. The driver in the normal driving position must be completely visible, with the exception of his forearms and lower legs, from the side opposite to the sidecar and from above. It is forbidden for the driver's legs to be enclosed.

The driver's position must be such that the driver's feet are positioned behind the knees when viewed from above and the footrests so designed and positioned that easy access is always available to any control pedal.

25.Passenger. The passenger must be able to lean out to either side of the sidecar. For this purpose the vehicle must be fitted with suitable handholds, which must be of the "closed loop" type.

26.Electrical Systems and Battery. All vehicles must be fitted with an easily accessible ignition switch, mounted in the vicinity of the handlebar/headset and within a radius of 200mm of the centre line of the top of the fork stem.  Switches must be of a positive locking type in both the on and off positions and when in the "OFF" position must not allow the engine to run.  The "OFF" position of all switches must be prominently marked in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa.

Any electric fuel feed pump must be wired in such a way as to cut out when the ignition switch is in the “OFF” position.

Batteries, if fitted, must be of the leak-proof type.

27.Throttle Controls. Throttle controls must be self-closing when not held by the hand.

28.Control Levers. All handlebar levers must be ball ended, the ball to be at least 19 mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

29.Date of Operation. This issue of these Regulations come into force and are operative from 1st February 2002.

 

 

TYRE DIAGRAM HERE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF PRODUCTION CLASS SOLO MOTORSCOOTERS FOR USE IN ALL ROAD RACES, SPRINTS AND HILL CLIMBS

 

1.   Introduction. These Regulations specify the requirements for construction of Production Class Solo Motor scooters for use in Road Races, Sprints and Hill Climbs as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   General. The regulations detailed below are applicable to ALL Production Class Solo Motor scooters.

THE SPIRIT OF THESE REGULATIONS WILL BE ADHERED TO AT ALL TIMES

3.   Definitions. Except as specially authorised by the A.C.U., a Production Class Solo Motor scooter is a two wheeled motor vehicle on which the driver may sit on a seat and have free and open space in front of the seat for passage of his legs, with the following additional characteristics:

(a)  The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250mm along a line projected forward from the top of the seat parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth vertically downwards must not be less than 250mm and its base not less than 100mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature except where any such obstruction was fitted as manufacturer's original equipment (e.g. Vespa 90SS).

(b)  It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold in the U.K. An Accountant's Certificate may be required as proof.

(c)  In cases of doubt the matter shall be referred to the Technical Committee.

4.   Basic Specification. Motor scooters must be as manufacturer's original specification except for the modifications detailed below. No other alterations, modifications or changes from manufacturer's original specification will be permitted.

5.   Seating. Any type of seating may be used provided it is properly padded and securely fitted in place, but it shall not extend beyond the rear of the bodywork of the machine unless so positioned in the manufacturer's original specification. No part of the seat must be more than 900 mm above the ground when the motor scooter is not loaded.

6.   Inclination. It must be possible for the motor scooter, not being loaded, to be inclined to an angle of 26º from the vertical without any part of it, other than the tyres, coming into contact with the ground.

7.   Footrests. Drivers must adopt a position with their feet on the footrests or they will be excluded.

8.   Projections. There shall be as few sharp projections as possible.  Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver.  All tubular ends must be securely fitted with rounded ends. ALL RACKS, SPARE WHEELS, CRASH BARS AND MIRRORS MUST BE REMOVED.

9.   Glass/Plastic Lenses. All glass or plastic in lights and on instruments must be securely taped to retain it in place in the event of breakage. Speedo and rev counter faces should be covered with transparent plastic sheet or tape.

10.Ignition System. The ignition system must be of the manufacturer's original type for the motor scooter. The timing position may be altered.  NO other modifications will be permitted.

11.Gearing. The gear casing, gearbox and gear cluster must be as manufacturer's original specification. NO modifications will be permitted.

12.Induction System. The induction system must be of manufacturer's original type for the motor scooter. NO increase in internal bore will be permitted. Jetting may be altered.

13.Bore and Stroke. The bore and stroke of the motor scooter must be clearly marked in letters and numbers at least 10mm in height, on the right hand side rear competition number plate.

14.  Fuel. Fuel must be a commercial brand of UNLEADED petrol as supplied from a wayside pump. No additives other than normal lubricants are permitted. The use of power boosters and/or octane boosters is specifically prohibited.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.     Exhaust Systems. The exhaust system must be as manufacturer's original specification; standard Pattern type exhaust systems will be permitted. The exhaust system must fulfil all the current A.C.U. requirements concerning noise control. The system must be constructed in a manner not prejudicial to the safety of the driver or any other competitor or official and be mounted in a safe manner. Exhaust fumes must not be discharged in a manner as to raise dust, foul the tyres or brakes or inconvenience any other driver. The furthest extremity of any exhaust pipe must not project beyond any part of the machine or its bodywork; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

16.Fuel Feed Taps. The fuel feed tap must be prominently marked to indicate the "OFF" position.

17.Oil Drain/Filler Plugs. All oil drain, level and filler plugs must be tight and drilled and wired in position.

18.Tyres. Only commercially available treaded tyres of good quality designed and manufactured as suitable for use on motor scooters will be permitted. At pre-competition scrutineering all tyres must have a minimum depth of tread of 1.6mm across the entire original tread area. The use of Agricultural, Industrial, "Slick" and recut-moulded tyres is prohibited

19.Brakes. The standard braking system must consist of two efficient brakes operated independently, one on each of the two road wheels.

EXCEPTIONS – For 2003 season Anti-Dive systems are permitted for use in Solo Standards Classes.

20.Ignition Switches and Battery. All vehicles must be fitted with an easily accessible ignition switch/key mounted in the vicinity of the handlebar/headset and within a radius of 200mm of the centre line of the top of the fork stem.  Switches/keys must be of a positive locking type in both on and off positions and when in the "OFF" position must not allow the engine to run.  The "OFF" position of all switches/keys must be prominently marked in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa.

Batteries, if fitted, must be of the leak-proof type.

21.Throttle Controls. Throttle controls must be self-closing when not held by the hand.

22.  Control Levers. All handlebar levers must be ball ended, the ball to be at least 19mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

23.     Date of Operation. This issue of these Regulations come into force and are operative from 1st February 2002

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF STREET CLASS SOLO MOTORSCOOTERS FOR USE IN ALL ROAD RACES, SPRINTS AND HILL CLIMBS

 

 

1.   Introduction. These Regulations specify the requirements for construction of "Street Class" Solo Motor scooters for use in Road Races, Sprints and Hill Climbs as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   General. The regulations detailed below are applicable to ALL "Street Class" Solo Motor scooters.

THE SPIRIT OF THESE REGULATIONS WILL BE ADHERED TO AT ALL TIMES

3.   Definitions. Except as specially authorised by the A.C.U., a "Street Class" Solo Motor scooter is a two wheeled motor vehicle on which the driver may sit on a seat and have free and open space in front of the seat for passage of his legs, with the following additional characteristics:

(a)The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250mm along a line projected forward from the top of the seat parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth vertically downwards must not be less than 250mm and its base not less than 100mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature except where any such obstruction was fitted as manufacturer's original equipment (e.g. Vespa 90SS).

(b)It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold in the U.K. An Accountant's Certificate may be required as proof.

(c)In cases of doubt the matter shall be referred to the Technical Committee.

4.   Basic Specification. Motor scooters must be in full compliance with all current legal requirements for use on the public highway and must have a current vehicle excise (Road Tax) licence and, where required, a current DTP Test Certificate.

5.   Seating. Any type of seating may be used provided it is properly padded and securely fitted in place, but it shall not extend beyond the rear of the bodywork of the machine unless so positioned in the manufacturer's original specification. No part of the seat must be more than 900 mm above the ground when the motor scooter is not loaded.

6.   Inclination. It must be possible for the motor scooter, not being loaded, to be inclined to an angle of 26º from the vertical without any part of it, other than the tyres, coming into contact with the ground.

7.   Footrests. Drivers must adopt a position with their feet on the footrests or they will be excluded.

8.   Projections. There shall be as few sharp projections as possible. Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver.  All tubular ends must be securely fitted with rounded ends. ALL RACKS, SPARE WHEELS, CRASH BARS AND MIRRORS MUST BE REMOVED.

9.   Glass/Plastic Lenses. All glass or plastic in lights and on instruments must be securely taped to retain it in place in the event of breakage. Speedo and rev counter faces should be covered with transparent plastic sheet or tape.

10.Fuel.   Fuel must be a commercial brand of UNLEADED petrol as supplied from a wayside pump. No additives other than normal lubricants are permitted. The use of power boosters and/or octane boosters is specifically prohibited.

11.Exhaust System. The exhaust system must fulfil all the current A.C.U. requirements concerning noise control. The system must be constructed in a manner not prejudicial to the safety of the driver or any other competitor or official and be mounted in a safe manner. Exhaust fumes must not be discharged in a manner as to raise dust, foul the tyres or brakes or inconvenience any other driver. The furthest extremity of any exhaust pipe must not project beyond any part of the machine or its bodywork; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

12.Fuel Feed Taps. The fuel feed tap must be prominently marked to indicate the "OFF" position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13.Oil Drain/Filler Plugs. All oil drain, level and filler plugs must be tight and drilled and wired in position.

14.Tyres. Only commercially available treaded tyres of good quality designed and manufactured as suitable for use on motor scooters and for use on the public highway will be permitted. At pre-competition scrutineering all tyres must have a minimum depth of tread of 1.6mm across the entire original tread area.  The use of Agricultural, Industrial, "Slick" and recut-moulded tyres is prohibited.

15.Brakes. The standard braking system must consist of two efficient brakes operated independently, one on each of the two road wheels.

EXCEPTIONS – For 2003 season Anti-Dive systems are permitted for use in Solo Standards Classes.

16.Ignition Switches and Battery. All vehicles must be fitted with an easily accessible ignition switch/key, which must be prominently marked to indicate the "OFF" position. Batteries, if fitted, must be of the leak-proof type.

17.Throttle Controls. Throttle controls must be self-closing when not held by the hand.

18.Control Levers. All handlebar levers must be ball ended, the ball to be at least 19mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

19.Date of Operation. These Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPECIAL STANDING REGULATIONS FOR PRODUCTION CLASS AND “STREET CLASS” COMPETITIONS IN ALL ROAD RACES, SPRINTS AND HILL CLIMBS

 

1.   Introduction. These Regulations specify the requirements for Solo Motor scooter Competitions for Production Class and "Street Class" in all Road Races, Sprints and Hill Climbs.

2.   Eligibility. Entry to and participation in Production Class and "Street Class” competitions is restricted to the holders of current Driver's Solo Competition Licences.

3.   Groups. For the purposes of these Regulations and any events for which they are applicable, there will be only one class of Solo Motor scooter: -

Motor scooters with an engine capacity not exceeding 260cc.

4.   Machine Specifications. All motor scooters used in events for which these Regulations are applicable shall comply with the requirements of the appropriate Standing Regulations for motor scooters as noted below: -

For Production Class Competitions - Standing Regulations for the Construction of Production Class Solo Motor scooters for use in all Road Races, Sprints and Hill Climbs.

For "Street Class" Competitions - Standing Regulations for the Construction of "Street Class" Solo Motor scooters for use in all Road Races, Sprints and Hill Climbs.

5.   Other Regulations. All other applicable Rules, Regulations and requirements of the A.C.U. shall be complied with.

6.   Date of Operation.  These Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF SOLO MOTORSCOOTERS FOR USE IN ALL SAND & GRASS TRACK RACES AND SCOOTACROSS

 

1.   Introduction. These Regulations specify the requirements for construction of Solo Motor scooters for use in Sand & Grass Track Races and Scrambles as referred to in Regulation 7 of the Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   General. For the purposes of these Regulations and any events for which they are applicable, SOLO MOTORSCOOTERS are divided into TWO categories - "Standard Class Machines" and "Special Scooters". The regulations detailed below are applicable to ALL Solo Motor scooters except where they specifically state For Standard Class Machines or For Special Scooters when they shall apply only to the appropriate category of Solo Motor scooter.

3.   Definitions. Except as specially authorised by the A.C.U., a Solo Motor scooter is a two wheeled motor vehicle on which the driver may sit on a seat and have free and open space in front of the seat for passage of his legs, with the following additional characteristics:

(a) The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250mm along a line projected forward from the top of the seat parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth vertically downwards must not be less than 250mm and its base not less than 100mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature except where any such obstruction was fitted as manufacturer's original equipment (e.g. Vespa 90SS).

(b) It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold in the U.K. An Accountant's Certificate may be required as proof.

(c) In cases of doubt the matter shall be referred to the Technical Committee.

4.   Frame and Bodywork.

For Standard Class Machines

The frame shall remain as the manufacturer's original specification.

The front forks must have originated from the same motor scooter type as the frame and the main structure of the forks shall remain as the manufacturer's original specification.

It must have a body and leg shields in the form of an apron and footboards of the platform type.

All detachable external panelwork, e.g. side panels, leg shields, footboards and front mudguards, which form part of the manufacturer's original specification shall be securely fixed in place.

The taillight unit and headlight and handlebar casings shall remain in their original position although glass may be removed (see Regulation 11).

Side panels, front mudguards and the top section of the headlight & handlebar casing may be replaced with properly manufactured components of similar appearance and structural strength to the original specification.

Minor modifications to panelling will be permitted to allow the fitting of larger carburettors, footrests, exhausts, and similar, but trimming or reducing original specification dimensions are prohibited.

Any type of seating may be used provided it is properly padded and securely fitted in place, but it shall not extend beyond the rear of the bodywork of the machine unless so positioned in the manufacturer's original specification. No part of the seat must be more than 900mm above the ground when the motor scooter is not loaded.

No streamlining, spoilers or material additions may be made to the bodywork.

Rear view mirrors are forbidden.

For Special Scooters

The basic frame and forks shall originate from a motor scooter as defined in Regulation 3 above. The main frame member extending from the steering head to the rear suspension mounting, and including the original engine mountings, must remain basically unaltered and Regulation 3(a) above shall be complied with at all times unless the motor scooter was originally manufactured so as to contravene the said Regulation 3(a).

Any "non-original" portions of the frame must be constructed of good quality seamless drawn steel

tube of a circular or non-circular section, welded or brazed together. If circular, the outside diameter shall not exceed 100mm, if non-circular, the maximum cross section shall not exceed 100mm measured

at right angles to any flat face.  The use of electrode metal arc welding is not recommended.  18

1The use of composite (i.e. skinned bonded honeycomb) or Monocoque construction is forbidden with the exception of those parts of the motor scooter which were so constructed as part of the manufacturer's original specification.

The use of TITANIUM and similar "exotic" metals is forbidden in the construction of the frame, front forks, handlebars, swinging arm and wheel spindles. The use of light alloys is forbidden for wheel spindles.

The front forks must have originated from the same motor scooter type as the frame and the main structure of the forks shall remain as the manufacturer's original specification except that the steering column may be shortened.

Any type of seating may be used provided it is properly padded, securely fitted in place and no part of the seat is more than 900mm above the ground when the motor scooter is not loaded.

Any form of bodywork may be used subject to the Regulations regarding streamlining in 5 below and provided the machine remains in a safe condition.

Rear view mirrors are forbidden.

5.   Streamlining.

For Standard Class Machines the provision of streamlining is prohibited.

For Special Scooters any streamlining fitted must comply with the following:

(a)  The streamlining must be easily detachable for scrutineering and be so designed and fitted to allow complete liberty of movement to the driver when the vehicle is in motion and when getting on and off the vehicle, without any part of it having to be displaced.

(b)  Aerofoils or spoilers are not permitted.

(c)  The front road wheel, with the exception of the tyre, must be visible from either side.

(d)The extreme forward part of the streamlining must not project forward of a vertical line drawn 50mm in front of the front wheel axle.

(e)  The extreme rearward part of the streamlining must not project rearward of a line drawn vertically at 330mm to the rear of the centreline of the axle of the rear wheel.

(f)   Normal mudguards are not considered as streamlining.

(g)It must be possible to see the driver completely with the exception of the forearms, in the normal driving position, from either side and from above.

(h)It is forbidden to use any transparent material to avoid the application of these Regulations.

(i)   No part of the seat or saddle or anything to the rear of these must be more than 900mm above the ground when the motor scooter is not loaded.

(j)   Whatever the position of the handlebars, there must be a clear space of at least 25mm between the streamlining and the extremities of the handlebars, including any attachments thereto, and a clear space of at least 20mm between the streamlining and any other part of the steering mechanism or front wheel.

6.   Inclination. It must be possible for the motor scooter, not being loaded, to be inclined to an angle of 26º from the vertical without any part of it, other than the tyres, coming into contact with the ground.

7.   Footrests. Footrests, which may comprise the original platform, must be provided and be so designed and positioned that easy access is available to all control pedals (See also Regulation 8). Drivers must adopt a position with their feet on the footrests or they will be excluded.

8.   Projections. There shall be as few sharp projections as possible.  Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver.  All tubular ends must be securely fitted with rounded ends.

9.   Kickstarts. It is recommended that kickstart pedals be removed.  Projecting kickstart shafts must be removed.

10.Glass. All glass in lights and on instruments must be either removed or securely taped to retain it in place in the event of breakage.

Where any glass is removed the exposed aperture must be securely covered or infilled to retain the original appearance.

11.     Air Intakes. Cooling air intakes, where permitted, must be so constructed that there is NO forward projection/protrusion to catch or foul in the event of an accident.                                                                           

12.Engine and Drive Units. The engine and drive unit must have originated from the same type of

Motor scooter as the frame and the drive must be transmitted to the road through the rear wheel of

the motor scooter.  The unit shall be properly and safely finished with all necessary studs, nuts, bolts and washers securely fitted. There shall be no evidence of oil leaks. The MAXIMUM PERMITTED engine capacity is 260 cc.                                                        

Any modifications made must not prejudice the safety of the driver, any other competitor or official and must be within the following parameters for the parts specified:

For Standard Class Machines

CYLINDER HEAD(s) - Liquid cooling of the cylinder head(s) is not permitted unless it formed part of the manufacturer's original specification for the engine used.

CYLINDER BARREL(s) - Cylinder barrel(s) must be as manufacturer's original specification (though not necessarily produced by the original manufacturer) in regard to shape, size, configuration, position and number of ports, and external appearance, materials and method of manufacture, except that:

(a)  Ports may be enlarged, but they may not be bridged nor the cylinder barrel(s) slotted. The position may not be changed, additional ports may not be provided, and the provision of additional material on either the inside or the outside of the barrel is prohibited.

(b)  The bore size of a cylinder may be increased by not more than 10 mm.

(c)  The cylinder length, between the base gasket and the head gasket faces may be reduced by not more than 10 mm.

(d)Sleeving will only be permitted in order to return the barrel(s) to their original bore specification. Sleeving may not be used to alter the number, position or configuration of ports, or to reduce the bore size to less than its design dimension.

(e)  The use of chrome, nicasil or any similar hard facing material to form the cylinder bore is prohibited except where provided as part of the manufacturer's original specification.

PACKING PIECES - The total thickness of any packing piece(s) or gasket(s) used between the base of the cylinder and the crankcase must not exceed 10 mm. Packing pieces may not be used as a means of increasing the available port area.

CRANKCASE - Crank casings must be as manufacturer's original specification, except that:

(a)  Modifications may be made to permit the use of a larger section tyre subject to the limitations in Regulation 22 below.

(b)  Modifications may be made to any existing crankcase porting except that the provision of additional material on either the inside or the outside of the casing is prohibited.

(c)  Notwithstanding the exception in B above, the provision of additional material to effect genuine repairs to a crankcase will be permitted provided that the final dimensions and appearance do not exceed the manufacturer's original specification.

CRANKSHAFT - The crankshaft shall remain as manufacturer's original specification, except that:

(a)  The ignition mounting may be altered.

(b)  Stroke size may not be altered except that when a crankshaft designed for use in any other motor scooter by the same manufacturer is used; the crankshaft stroke shall be as originally specified for the crankshaft employed.

(c)  Modifications may be made in respect of inlet timing.

(d)The crankshaft may be "padded" but must originate from a motor scooter engine produced by the same manufacturer as the engine unit in use.

(e)  The connecting rod may be altered or changed.

(f)   The crankshaft may be altered to accommodate the use of modified connecting rod assemblies.

GEARCASE - The gear casing must be as manufacturer's original specification.

GEARBOX - The gearbox must be as manufacturer's original specification for the engine type, except that the original gear cluster may be altered to provide alternative ratios. The thickness of the original loose gears may be altered but the original gear teeth must remain.  The number of ratios must remain unchanged.

For Special Scooters

CYLINDER BARREL(s), CRANKCASE and CRANKSHAFT -

(a)  In regard to shape, size, configuration, position and number of ports, and external appearance, materials and method of manufacture, the cylinder barrel(s) must have originally conformed to the manufacturer's original specification (though not necessarily produced by the original manufacturer) or be included in the A.C.U. list of approved kit barrels.

(b)  The bore size of a cylinder may be increased by no more than 10mm.

(c)  The cylinder used must have been originally designed for the engine type, must retain the original method and position of fitting and both the cylinder and the crankcase must retain the centres of the original stud holes used for bolting the cylinder to the crankcase.  It must therefore be possible, with the exception of interference from a modified cylinder spigot, to fit the cylinder to a standard crank casing as produced by the original manufacturer of the engine unit used.

(d)The crankcase to cylinder gasket face must be parallel to that of the original crankcase.

(e)  The crank casing must retain the original mounting points for support within the frame and the principal external dimensions must remain as manufacturer's original specification.

(f)   Any modification to the crank casing to permit usage of modified crankshaft assemblies will not be permitted if the modification is so extensive as to preclude the fitting of the standard crankshaft as produced by the original manufacturer of the engine unit used.

(g)Any type of crankshaft may be used subject to the limitations specified in sub paragraph F above.

(h)Liquid cooling, or any other modification, to the cylinder will not be permitted if the modification is so extensive as to preclude identification of the origin of the cylinder.

GEARCASE / GEARBOX - The gearcase must be basically as the manufacturer's original specification. Modifications may be made to the number of drive ratios, the ratios themselves and to the gears. Alterations to the gear casing will not be permitted if the modification is so extensive as to preclude the fitting of a standard gear set as produced by the original manufacturer of the engine unit used.

NOTE: For the purposes of this Regulation, the 'engine' is deemed to comprise the cylinder barrel(s), crankcase and all internal components within these units.

13.Engine Position. The engine must be positioned in the frame in an identical position and manner to that of the original motor scooter.

14.Induction Systems

For Standard Class Machines any form of carburation may be used but changes to the method of induction (i.e. use of reed or rotary valves unless originally fitted) are excluded. The use of fuel injection or forced induction (see regulation 16) is prohibited.

For Special Scooters any form of induction system may be used with the exception of forced induction (see regulation 16), which is prohibited.

15.Forced Induction. An engine shall be considered as having Forced Induction when in respect of one engine cycle, the total volume of gaseous mixture induced exceeds the capacity, measured geometrically, of the engine working cylinder(s). The intra-cylinder injection of fuel shall not be considered as forced induction.

16.Fuel. Fuel must be a commercial brand of petrol as supplied from a wayside pump. No additives other than lubricants are permitted.  The use of power boosters and/or octane boosters is specifically prohibited.

17.Exhaust Systems. The exhaust systems must fulfil all the current A.C.U. requirements concerning noise control. The systems must be constructed in a manner not prejudicial to the safety of the driver or any other competitor or official and be mounted in a safe manner.  Exhaust fumes must not be discharged in a manner as to raise dust, foul the tyres or brakes or inconvenience any other driver. The furthest extremity of any exhaust pipe must not project beyond any part of the machine or its bodywork or streamlining; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

For Standard Class Machines exhaust systems must be basically fitted in the standard position and follow the original routing. The use of variable exhaust valves on expansion systems is prohibited.

For Special Scooters where high level exhaust systems are used they must have an adequate heat shield fitted to prevent contact with the systems by the driver in normal driving position and also by the driver or others in the event of an accident.

18.Fuel Tank. All fuel tanks must be provided with a securely fitted filler cap fitted in such a way that it does not protrude from the bodywork and cannot be torn off in an accident.

A fuel feed tap must be fitted in an easily accessible position and be prominently marked to indicate the "OFF" position.

Any fuel tank breather pipe must be fitted with a non-return valve and must discharge into a leak-proof catch tank having a minimum capacity of 500 ml, which must be empty at scrutineering.

All fuel pipes must be adequately secured.

For Standard Class Machines the fuel tank shall remain as the manufacturer's original specification.

For Special Scooters fuel tank(s) must be soundly constructed, entirely of metal.                           

19.Oil Drain/Filler Plugs and Catch Tanks. All oil drain; level and filler plugs must be tight and drilled

and wired in position. Any oil breather pipe fitted must discharge into a catch tank mounted in an easily

accessible position and having a minimum capacity of 500 ml. The catch tank must be empty at scrutineering.

20.Steering. Steering shall be through the front wheel only by means of non-adjustable handlebars

securely fixed to the steering head of the motor scooter and having a MINIMUM overall width of

 510 mm.

The angle of rotation of the handlebars, measured horizontally at ground level to each side of a straight ahead position, must be a MINIMUM of 20º and steering stops must be fitted to limit angular movement to a MAXIMUM of 65º and/or to allow a MINIMUM clear space of 25mm between the handlebars and any part of the bodywork, streamlining, tank or similar attachments.

Whatever the position of the handlebars and suspension no part of the front wheel or forks must pass within 20mm of any bodywork or streamlining.

For Standard Class Machines alterations to cast handlebar assemblies are prohibited except as provided in Regulation 4 above, and for Lambretta Vega and Luna type machines where lowering of the handlebar grips is permitted providing the grips remain in the same horizontal and vertical planes relative to the ground and they are fixed to the original casting base.

21.Wheels and Tyres. All wheels and hubs must be of metal construction and the rim diameter must not exceed 407mm.   For Standard Class Machines wheels must be as manufacturer's original specification.

Tyres must be of a commercially available type with a clearly definable tread pattern and be suitable for use on motor scooters.  At pre-competition scrutineering all tyres must have a minimum depth of tread of 1.6mm across the entire original tread area. 

Agricultural, industrial, moto-cross or "deep block pattern" tyres may be used unless specifically prohibited in the Supplementary Regulations.

The use of recut moulded tyres or any non-skid attachment to tyres is prohibited.

22.Suspension.

For Standard Class Machines all suspension links, legs, yokes, swing arm or other similar component of the front and/or rear suspension assembly shall remain as manufacturer's original specification. Springs, dampers and "suspension units" may be replaced with non-original components but must be mounted in a manner identical to that of the original component.

23.Brakes. The braking system must consist of two efficient brakes operated independently, one on each of the two road wheels.

For Standard Class Machines brakes must be as manufacturer's original specification except that the method of operation may be changed.

24.Mudguards.  Mudguards are compulsory on both wheels and must comply with the following:

(a)  All mudguards must be properly and safely constructed, and securely mounted.

(b)  A mudguard must project laterally by at least 10mm on both sides of the tyre.

(c)  The front mudguard must cover at least 100º of the circumference of the wheel, and the angle contained by a line drawn from the rear end of the mudguard to the centre of the wheel and a line drawn horizontally through the centre of the wheel must not exceed 20º.  Similarly, the angle contained by a line drawn from the front end of the mudguard to the centre of the wheel and a line drawn horizontally through the centre of the wheel must not be less than 45º, nor exceed 60º.

(d)The rear mudguard must cover at least 120º of the circumference of the wheel, and the angle contained by a line drawn from the rear end of the mudguard to the centre of the wheel and a line drawn horizontally through the centre of the wheel must not exceed 20º.

25.Electrical Systems and Battery. All vehicles must be fitted with an easily accessible ignition switch, mounted in the vicinity of the handlebar/headset and within a radius of 200mm of the centre line of the top of the fork stem.  Switches must be of a positive locking type in both the on and off positions and when in the "OFF" position must not allow the engine to run.  The "OFF" position of all switches must be prominently marked in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa.

Batteries, if fitted, must be of the leak-proof type.

26.Throttle Controls. Throttle controls must be self-closing when not held by the hand.

27.Control Levers. All handlebar levers must be ball ended, the ball to be at least 19mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

28.Date of Operation. These Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF

SOLO MOTORSCOOTERS FOR USE IN ALL ROAD RACES, 

 SPRINTS AND HILL CLIMBS

 

 

1.   Introduction. These Regulations specify the requirements for construction of Solo Motor scooters for use in Road Races, Sprints and Hill Climbs as referred to in Standing Regulations for all Motor scooter Road, Sand and Grass Track Races, Sprints, Hill Climbs and Scootacross.

2.   General. For the purposes of these Regulations and any events for which they are applicable, SOLO MOTORSCOOTERS are divided into TWO categories - "Standard Class Machines" and "Special Scooters".  The regulations detailed below are applicable to ALL Solo Motor scooters except where they specifically state For Standard Class Machines or For Special Scooters when they shall apply only to the appropriate category of Solo Motor scooter.

3.   Definitions. Except as specially authorised by the A.C.U., a Solo Motor scooter is a two wheeled motor vehicle on which the driver may sit on a seat and have free and open space in front of the seat for passage of his legs, with the following additional characteristics:

(a)  The minimum size of the space forward of the seat must be a regular or irregular trapezium with its top measuring 250mm along a line projected forward from the top of the seat parallel with a line drawn through the centres of the two road wheels and measured from the front extremity of the seat towards the steering column. Its depth vertically downwards must not be less than 250mm and its base not less than 100mm. The minimum space must be clear at all times of any obstruction of a permanent or temporary nature except where any such obstruction was fitted as manufacturer's original equipment (e.g. Vespa 90SS).

(b)  It shall have been manufactured by a manufacturer recognised by the A.C.U. and not less than one hundred machines of that type equipped with the manufacturer's original or optional equipment must have been made and sold in the U.K. An Accountant's Certificate may be required as proof.

(c)  In cases of doubt the matter shall be referred to the Technical Committee.

4.   Frame and Bodywork.

For Standard Class Machines

The frame shall remain as the manufacturer's original specification.

The front forks must have originated from the same motor scooter type as the frame and the main structure of the forks shall remain as the manufacturer's original specification.

It must have a body and leg shields in the form of an apron and footboards of the platform type.

All detachable external panelwork, e.g. side panels, leg shields, footboards and front mudguards, which form part of the manufacturer's original specification shall be securely fixed in place.

The tail-light unit and headlight and handlebar casings shall remain in their original position although glass may be removed (see Regulation 10).

Side panels, front mudguards and the top section of the headlight & handlebar casing may be replaced with properly manufactured components of similar appearance and structural strength to the original specification.

Minor modifications to panelling will be permitted to allow the fitting of larger carburettors, footrests, exhausts, and similar, but trimming or reducing original specification dimensions are prohibited.

Any type of seating may be used provided it is properly padded and securely fitted in place, but it shall not extend beyond the rear of the bodywork of the machine unless so positioned in the manufacturer's original specification. No part of the seat must be more than 900 mm above the ground when the motor scooter is not loaded.

No streamlining, spoilers or material additions may be made to the bodywork.

Rear view mirrors are forbidden.

For Special Scooters

The basic frame and forks shall originate from a motor scooter as defined in Regulation 3 above. The main frame member extending from the steering head to the rear suspension mounting, and including the original engine mountings, must remain basically unaltered and Regulation 3(a). The above shall be complied with at all times unless the motor scooter was originally manufactured so as to contravene the said Regulation.

Any "non-original" portions of the frame must be constructed of good quality seamless drawn steel

tube of a circular or non-circular section, welded or brazed together. If circular, the outside diameter shall not exceed 100mm, if non-circular, the maximum cross section shall not exceed 100mm measured at right angles to any flat face.  The use of electrode metal arc welding is not recommended. 

The use of composite (i.e. skinned bonded honeycomb) or Monocoque construction is forbidden with the exception of those parts of the motor scooter which were so constructed as part of the manufacturer's original specification.

The use of TITANIUM and similar "exotic" metals is forbidden in the construction of the frame, front forks, handlebars, swinging arm and wheel spindles. The use of light alloys is forbidden for wheel spindles.

The front forks must have originated from the same motor scooter type as the frame and the main structure of the forks shall remain as the manufacturer's original specification except that the steering column may be shortened.

Any type of seating may be used provided it is properly padded, securely fitted in place and no part of the seat is more than 900 mm above the ground when the motor scooter is not loaded.

Any form of bodywork may be used subject to the Regulations regarding streamlining in 5 below and provided the machine remains in a safe condition.

Rear view mirrors are forbidden.

5.   Streamlining.

For Standard Class Machines the provision of streamlining is prohibited.

For Special Scooters any streamlining fitted must comply with the following:

(a)  The streamlining must be easily detachable for scrutineering and be so designed and fitted to allow complete liberty of movement to the driver when the vehicle is in motion and when getting on and off the vehicle, without any part of it having to be displaced.

(b)  Aerofoils or spoilers are not permitted.

(c)  The front road wheel, with the exception of the tyre, must be visible from either side.

(d)The extreme forward part of the streamlining must not project forward of a vertical line drawn 50mm in front of the front wheel axle.

(e)  The extreme rearward part of the streamlining must not project rearward of a line drawn vertically at 330mm to the rear of the centreline of the axle of the rear wheel.

(f)   Normal mudguards are not considered as streamlining.

(g)It must be possible to see the driver completely with the exception of the forearms, in the normal driving position, from either side and from above.

(h)It is forbidden to use any transparent material to avoid the application of these Regulations.

(i)   No part of the seat or saddle or anything to the rear of these must be more than 900mm above the ground when the motor scooter is not loaded.

(j)   Whatever the position of the handlebars, there must be a clear space of at least 25 mm between the streamlining and the extremities of the handlebars, including any attachments thereto, and a clear space of at least 20 mm between the streamlining and any other part of the steering mechanism or front wheel.

6.   Inclination. It must be possible for the motor scooter, not being loaded, to be inclined to an angle of 26º from the vertical without any part of it, other than the tyres, coming into contact with the ground.

7.  Footrests. Footrests, which may comprise the original platform, must be provided and be so designed and positioned that easy access is available to all control pedals (See Regulation 8).  Drivers must adopt a position with their feet on the footrests or they will be excluded.

8.   Projections. There shall be as few sharp projections as possible.  Where there are projections, they must be covered in such a way as to prevent injury, occasioned by accidental contact, to the driver.  All tubular ends must be securely fitted with rounded ends.

9.   Kickstarts. It is recommended that kickstart pedals be removed.  Projecting kickstart shafts must be removed.

10.           Glass. All glass in lights and on instruments must be either removed or securely taped to retain it in place in the event of breakage.

Where any glass is removed the exposed aperture must be securely covered or infilled to retain the original appearance.

11.           Air Intakes. Cooling air intakes, where permitted, must be so constructed that there is NO forward projection/protrusion to catch or foul in the event of an accident.

12.           Engine and Drive Units. The engine and drive unit must have originated from the same type of motor scooter as the frame and the drive must be transmitted to the road through the rear wheel of the motor scooter.

The unit shall be properly and safely finished with all necessary studs, nuts, bolts and washers securely fitted. There shall be no evidence of oil leaks. The MAXIMUM PERMITTED engine capacity is 260 cc.                                                        

Any modifications made must not prejudice the safety of the driver, any other competitor or official and must be within the following parameters for the parts specified:

For Standard Class Machines

CYLINDER HEAD(s) - Liquid cooling of the cylinder head(s) is not permitted unless it formed part of the manufacturer's original specification for the engine used.

CYLINDER BARREL(s) - Cylinder barrel(s) must be as manufacturer's original specification (though not necessarily produced by the original manufacturer) in regard to shape, size, configuration, position and number of ports, and external appearance, materials and method of manufacture, except that:

(a).Ports may be enlarged, but they may not be bridged nor the cylinder barrel(s) slotted. The position may not be changed, additional ports may not be provided, and the provision of additional material on either the inside or the outside of the barrel is prohibited.

(b)  The bore size of a cylinder may be increased by not more than 10 mm.

(c)  The cylinder length, between the base gasket and the head gasket faces may be reduced by not more than 10 mm.

(d)Sleeving will only be permitted in order to return the barrel(s) to their original bore specification. Sleeving may not be used to alter the number, position or configuration of ports, or to reduce the bore size to less than its design dimension.

(e)  The use of chrome, nicasil or any similar hard facing material to form the cylinder bore is prohibited except where provided as part of the manufacturer's original specification.

(f)   EXCEPTIONS – The use of certain performance cylinders is now permitted as follows: - Vespa machines in Classes 2 + 3 – the use of Malossi, Pinasco, and Polini cylinders are permitted. The use of twin induction cylinders is forbidden. Lambretta machines in class 4 - the use of the AF Rapido 200 cylinder is permitted.

PACKING PIECES - The total thickness of any packing piece(s) or gasket(s) used between the base of the cylinder and the crankcase must not exceed 10 mm. Packing pieces may not be used as a means of increasing the available port area.

CRANKCASE - Crank casings must be as manufacturer's original specification, except that:

(a)  Modifications may be made to permit the use of a larger section tyre subject to the limitations in Regulation 22 below.

(b)  Modifications may be made to any existing crankcase porting except that the provision of additional material on either the inside or the outside of the casing is prohibited.

(c)  Notwithstanding the exception in B above, the provision of additional material to effect genuine repairs to a crankcase will be permitted provided that the final dimensions and appearance do not exceed the manufacturer's original specification.

CRANKSHAFT - The crankshaft shall remain as manufacturer's original specification, except that:

(a)  The ignition mounting may be altered. 

(b)  Stroke size may not be altered except that when a crankshaft designed for use in any other motor scooter by the same manufacturer is used; the crankshaft stroke shall be as originally specified for the crankshaft employed.

(c)  Modifications may be made in respect of inlet timing.

(d)The crankshaft may be "padded" but must originate from a motor scooter engine produced by the same manufacturer as the engine unit in use.

(e)  The connecting rod may be altered or changed.

(f)   The crankshaft may be altered to accommodate the use of modified connecting rod assemblies.

GEARCASE - The gear casing must be as manufacturer's original specification.

GEARBOX - The gearbox must be as manufacturer's original specification for the engine type, except that the original gear cluster may be altered to provide alternative ratios. The thickness of the original loose gears may be altered but the original gear teeth must remain.  The number of ratios must remain unchanged.

For Special Scooters

CYLINDER BARREL(s), CRANKCASE and CRANKSHAFT -

(a)  In regard to shape, size, configuration, position and number of ports, and external appearance, materials and method of manufacture, the cylinder barrel(s) must have originally conformed to the manufacturer's original specification (though not necessarily produced by the original manufacturer) or be included in the ACU list of approved kit barrels.

(b)  The bore size of a cylinder may be increased by no more than 10mm.

(c)  The cylinder used must have been originally designed for the engine type, must retain the original method and position of fitting and both the cylinder and the crankcase must retain the centres of the original stud holes used for bolting the cylinder to the crankcase.  It must therefore be possible, with the exception of interference from a modified cylinder spigot, to fit the cylinder to a standard crank casing as produced by the original manufacturer of the engine unit used.

(d)The crankcase to cylinder gasket face must be parallel to that of the original crankcase.

(e)  The crank casing must retain the original mounting points for support within the frame and the principal external dimensions must remain as manufacturer's original specification.

(f)   Any modification to the crank casing to permit usage of modified crankshaft assemblies will not be permitted if the modification is so extensive as to preclude the fitting of the standard crankshaft as produce by the original manufacturer of the engine unit used.

(g)Any type of crankshaft may be used subject to the limitations specified in sub paragraph F above.

(h)Liquid cooling, or any other modification, to the cylinder will not be permitted if the modification is so extensive as to preclude identification of the origin of the cylinder.

GEARCASE / GEARBOX - The gearcase must be basically as the manufacturer's original specification. Modifications may be made to the number of drive ratios, the ratios themselves and to the gears. Alterations to the gear casing will not be permitted if the modification is so extensive as to preclude the fitting of a standard gear set as produced by the original manufacturer of the engine unit used.

NOTE: For the purposes of this Regulation, the 'engine' is deemed to comprise the cylinder barrel(s), crankcase and all internal components within these units.

13.Engine Position. The engine must be positioned in the frame in an identical position and manner to that of the original motor scooter.

14.Induction Systems.

For Standard Class Machines any form of carburation may be used but changes to the method of induction (i.e. use of reed or rotary valves unless originally fitted) are excluded. The use of fuel injection or forced induction (see Regulation 16) is prohibited.

For Special Scooters any form of induction system may be used with the exception of forced induction (see Regulation 16), which is prohibited.

15.Forced Induction. An engine shall be considered as having Forced Induction when in respect of one engine cycle, the total volume of gaseous mixture induced exceeds the capacity, measured geometrically, of the engine working cylinder(s). The intra-cylinder injection of fuel shall not be considered as forced induction.

16.Fuel. Fuel will be a maximum of a100 ll octane. The use of power boosters and/or octane boosters is specifically prohibited.

17.Exhaust Systems. The exhaust systems must fulfil all the current A.C.U. requirements concerning noise control. The systems must be constructed in a manner not prejudicial to the safety of the driver or any other competitor or official and be mounted in a safe manner.  Exhaust fumes must not be discharged in a manner as to raise dust, foul the tyres or brakes or inconvenience any other driver. The furthest extremity of any exhaust pipe must not project beyond any part of the machine or its bodywork or streamlining; nor must the end of any exhaust pipe point upwards or downwards at an angle greater than 10º from the horizontal.

For Standard Class Machines exhaust systems must be basically fitted in the standard position and follow the original routing. The use of variable exhaust valves on expansion systems is prohibited.

For Special Scooters where high-level exhaust systems are used they must have an adequate heat shield fitted to prevent contact with the systems by the driver in normal driving position and also by the driver or others in the event of an accident.

18.Fuel Tank. All fuel tanks must be provided with a securely fitted filler cap fitted in such a way that it does not protrude from the bodywork and cannot be torn off in an accident.

A fuel feed tap must be fitted in an easily accessible position and be prominently marked to indicate the "OFF" position.

Any fuel tank breather pipe must be fitted with a non-return valve and must discharge into a leak-proof catch tank having a minimum capacity of 500 ml, which must be empty at scrutineering.           

All fuel pipes must be adequately secured.

For Standard Class Machines the fuel tank shall remain as the manufacturer's original specification.

For Special Scooters fuel tank(s) must be soundly constructed, entirely of metal.

19.Oil Drain/Filler Plugs and Catch Tanks. All oil drain, level and filler plugs must be tight and drilled and wired in position. Any oil breather pipe fitted must discharge into a catch tank mounted in an easily accessible position and having a minimum capacity of 500 ml. The catch tank must be empty at scrutineering.

20.Steering. Steering shall be through the front wheel only by means of non-adjustable handlebars securely fixed to the steering head of the motor scooter and having a MINIMUM overall width of 510 mm.

The angle of rotation of the handlebars, measured horizontally at ground level to each side of a straight ahead position, must be a MINIMUM of 20º and steering stops must be fitted to limit angular movement to a MAXIMUM of 65º and/or to allow a MINIMUM clear space of 25 mm between the handlebars and any part of the bodywork, streamlining, tank or similar attachments.

Whatever the position of the handlebars and suspension no part of the front wheel or forks must pass within 20 mm of any bodywork or streamlining.

For Standard Class Machines alterations to cast handlebar assemblies are prohibited except as provided in Regulation 4 above, and for Lambretta Vega and Luna type machines where lowering of the handlebar grips is permitted providing the grips remain in the same horizontal and vertical planes relative to the ground and they are fixed to the original casting base.

21.Wheels and Tyres. All wheels and hubs must be of metal construction and the rim diameter must not exceed 407mm. 

Only treaded tyres designed and manufactured as suitable for use on motor scooters will be permitted and at pre-competition scrutineering all tyres must have a minimum depth of tread of 1.6 mm across the entire original tread area.

The use of recut moulded tyres or any non-skid attachment to tyres is prohibited.

For Standard Class Machines wheels must be as manufacturer's original specification and tyres must not deviate from original specification section by more than 13mm.

22.Suspension. For Standard Class Machines all suspension links, legs, yokes, swing arm or other similar component of the front and/or rear suspension assembly shall remain as manufacturer's original specification. Springs, dampers and "suspension units" may be replaced with non-original components but must be mounted in a manner identical to that of the original component.

Anti-Dive systems are permitted for use in Solo Standards Classes.

23.Brakes. The braking system must consist of two efficient brakes operated independently, one on each of the two road wheels.

For Standard Class Machines brakes must be as manufacturer's original specification except that the method of operation may be changed.

24.Mudguards. For Special Scooters mudguards are not compulsory. Where fitted they must be adequate for the purpose, properly and safely constructed, and securely mounted.

For Standard Class Machines mudguards are not compulsory except where they form part of the external bodywork and are required to be fitted in accordance with Regulation 4 above. Where optional mudguards are fitted they must be adequate for the purpose, properly and safely constructed, and securely mounted.

25.Electrical Systems and Battery. All vehicles must be fitted with an easily accessible ignition switch, mounted in the vicinity of the handlebar/headset and within a radius of 200mm of the centre line of the top of the fork stem.  Switches must be of a positive locking type in both the on and off positions and when in the "OFF" position must not allow the engine to run. The "OFF" position of all switches must be prominently marked in capital letters of at least 10mm in height with dark coloured letters on a light background and vice versa.

Batteries, if fitted, must be of the leak-proof type.

26.Throttle Controls. Throttle controls must be self-closing when not held by the hand.

27.Control Levers. All handlebar levers must be ball ended, the ball to be at least 19 mm in diameter and to be a permanently fixed integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

28.Date of Operation. This issue of these Regulations come into force and are operative from 1st February 2002.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STANDING REGULATIONS FOR THE CONSTRUCTION OF FORMULA 125 COMBINATIONS FOR USE IN ROAD RACES, SPRINTS AND HILL CLIMBS

 

1. General

The sidecar must be on the left side of the machine and the three road wheels must be disposed to give two tracks.

Hinged sidecars and steerable sidecar wheels are forbidden neither the driver nor the passenger may be attached to the machine.

2. Construction

The frame must be of good quality drawn steel tube of circular or non-circular section, welded or brazed together. If circular the outside diameter must not exceed 100mm. If non-circular the maximum cross section shall not exceed 150mm. measured at right angles to any flat surface.

The above does not restrict the swinging arm. The use of composite construction is forbidden with the exception of the sidecar platform,

i.e. Aluminum or carbon fibre honeycomb.

The use of Titanium or other similar ‘exotic’ materials in the construction of the frame, forks, handlebars, swinging arm and wheel spindles is forbidden.

The use of electrode metal arc welding (open arc welding) is not recommended, primarily due to the nature of the ‘electrode arc’ process.

3. Dimensions

Width: The overall maximum shall be 1524mm. (60"). measured over the extremities of the streamlining.

Wheelbase:  The maximum shall be 1829mm. (72") measured between the centres of the front and rear wheels.

Track: The minimum shall be 760mm.The maximum shall be 1170mm.

The track being the distance measured between the rear and sidecar wheel, the point of measurement being at right angles to a line drawn between the centre line of the front and rear wheels of the combination and a line at right angles passing through the sidecar wheel.

Ground clearance:

The minimum clear space to be maintained beneath the entire under surface of the machine when loaded with fuel, driver and passenger must be 65mm.

4. Streamlining and bodywork:

This must be easily detachable for scrutineering purposes and be so designed and fitted to allow complete liberty of movement to the driver and passenger when the vehicle is in motion and when getting on and off the vehicle without any part of the streamlining being displaced.

Fairings and Rear view mirrors are allowed.

A solid and effective protection must be fitted between the driver and the engine to prevent direct contact between the driver’s body or clothing from escaping flames or leaking oil.

Any type of seating may be used provided it is properly padded and securely fitted in place.

The extreme forward part of any streamlining must not project forward in plan beyond the most forward part of the front tyre by more than 400mm.

The extreme rearward part of the streamlining must not project rearward in plan beyond the most rearward part of the rear tyre by more than 400mm.

5.Projections

There shall be no sharp projections. Any projections must be covered in such a way as to prevent injury, occasioned by accidental contact, by driver or passenger.

Hand gear levers must have ball ends, must be securely fixed and the end must be a minimum of 25mm. in diameter.

Single ended frame projections must be avoided.

6. Driveguards

A metal guard must be fitted to prevent accidental contact with the chain or sprocket.

Drive chains must be guarded from sprocket to sprocket.

7. Glass. All glass in instruments must be securely fixed and taped to retain the glass in place in the event of breakage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8. Air Intakes

Cooling air intakes must be constructed so that there is No forward projection / protrusion to catch or foul in the event of an accident.

9. Engine and Drive Unit.

Permitted engine: 125cc. i.e. Aprillia

Drive must be transmitted to the road through the rear wheel of the machine.

The engine unit must be properly and safely finished, all studs, bolts, nuts and washers fitted securely in place.

There shall be no evidence of oil leaks.

Any modifications made to the engine unit must not prejudice the safety of the driver and passenger or other competitor or official and must be within the specifications of the engine and drive unit regulations.

Cylinder Barrel and Crankcase

a. In regard to the shape, size, configuration, position and number of ports, external appearance, materials and manufacture, the cylinder barrel must conform to the manufacturers original specification (though not necessarily produced by the same manufacturer).

b. The bore size of a cylinder may be increased.

c. The cylinder used, must have been originally designed for the engine type, must retain the original method and position of fixing, (the number and position of studs in the crankcase at the gasket face must be as manufacturers original specification).

d. The crankcase to cylinder gasket face must be parallel to that of the original crankcase.

The crankcase porting may be altered.

e. The crankcase must retain the original mounting points, which must be used to support the engine in the frame.

External dimensions of the crankcase must remain as manufacturers original specification.

f. The Crankshaft must remain as the manufacturers original specification, although the connecting rod may be modified or substituted.

g. Alternative pistons may be used to change the characteristics of the engine.

The cylinder barrel gasket faces may be machined to allow for the difference in compression height of the piston used.

h. Liquid cooling of the engine case will not be permitted.

10. Engine Position.

The engine must be positioned between the steering headstock and the rear wheel.

11. Induction Systems.

Any form of induction system may be used with the exception of superchargers.       

12. Fuel. - UNLEADED

A fuel tank with a breather pipe must be fitted with a non-return valve and discharge into a minimum of 500ml. catch bottle.

Fuel must be commercially available brand of petrol, as supplied from a wayside petrol station. (Aviation fuel, ‘Avgas’ is not included).

No additives other than lubricants are permitted, (power boosters, octane boosters are prohibited).

13. Exhaust Systems.

The exhaust system must fulfil all the requirements concerning noise control (see ACU handbook).

The system must be constructed in a manner not to prejudice the safety of other competitors or officials. Exhaust fumes must not be discharged so as to raise dust, foul tyre or brakes or inconvenience a passenger or other competitor. The furthest extremity of any exhaust system must not project beyond the machines bodywork or streamlining.

The end(s) of the exhaust Pipe(s) must not point up or downwards by more than 100 from the horizontal.

15. Oil Drain / Filler Plugs.

All oil drain, level and filler plugs must be tight and drilled and wire locked into position. Oil breather pipes must discharge into a minimum of 500ml. catch bottle.

All fuel /oil pipes must be adequately secured. (Oil lines containing positive pressure, must be of steel re-inforced construction with swaged or threaded connectors).

16. Steering.

Steering will be through the front wheel only, by means of handlebars with a minimum width of 450mm.

The minimum angle of rotation of the handlebars each side of the straight-ahead position must be 30o, stops must be fitted to limit the angular movement of the handlebars to 65o.                                       

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Whatever the position of the handlebars and suspension, no part of the front wheel or forks must pass within 20mm. of any bodywork or streamlining.

It is permissible to displace the steering head up to a maximum of 75mm. determined by measuring the offset from the centre line of the rear wheel.

Machines with offset steering heads must maintain two tracks.

17.Wheels & Tyres

All wheels rims must be of metal construction and a maximum diameter of 407mm.

The wheel when fitted in position must rotate within 5o of the vertical plane.

At pre-competition scrutineering all moulded treaded tyre must have a minimum of 1.6mm. of tread across the entire original tread area. (recut moulded tyre are not permitted).

Sidecar wheels may be Kart type ‘slick’ tyre, the surface of the tyre must contain three or more wear indicators positioned at 120o around the tyre circumference. When at least two of these become worn on different parts of the tyre, the tyre may no longer be used.

Wheel spindles must pass through the fork legs /swinging arm assemblies which must provide a positive location for the spindle when assembled, split pin locking and/or nylon locking nuts must be used to prevent   the axle coming lose.

18. Rear Suspension.

The rear suspension, if fitted is to be the swinging arm type. Movement of the arm i.e. for the purpose of chain adjustment can be by means of eccentric cams.

Note, any adjustment used must not allow the wheelbase to exceed the maximum permitted dimension.

19. Brakes.

The braking system must consist of least two brakes

operated independently on the front and rear wheel, each giving complete control. Braking of the sidecar wheel is optional.

20. Mudguards and Wheel Protection.

The rear wheel mudguard must cover at least 240 degrees of the rear wheel. The side nearest to the sidecar wheel must be enclosed. The sidecar wheel must be enclosed from the sidecar platform and level with the sidecar platform around the periphery. For rear exit sidecars the sidecar wheel must be totally enclosed down to the platform level.

21. Driver

The driver in the normal driving position must be completely visible, with the exception of his forearms and lower legs, from the side opposite to the sidecar and from above. It is forbidden for the driver’s legs to be enclosed.

The driver’s position must be such that the driver’s feet are positioned behind the knees when viewed from above and the footrests so designed and positioned that easy access is always available to any control pedal.

22. Passenger

the passenger must be able to lean out to either side of the sidecar. For this purpose the vehicle must be fitted with suitable handholds, which must be of the “closed loop” type.

23. Electrical Systems And Battery

All vehicles must be fitted with an easily accessible ignition switch, mounted in the vicinity of the handlebar/headset and within a radius of 200mm. of the centre line of the top of the folk stem.  Switches must be of a positive locking type in both the on and off position and when in the “OFF” position must not allow the engine to run. radius of the steering column

24. Throttle Controls

Throttle controls must be self-closing when not held by the hand.

25. Control Levers

All handlebar levers must be ball ended, the ball to be at least 19mm. in diameter and to be an integral part of the lever. Each control lever (both hand and foot) must be mounted on an independent pivot. Handlebar grips must be securely fixed to the ends of the handlebars.

26. Date Of Operation

This issue of these Regulations come into force and are operative from 1st February 2002.

 

    

ADDITIONS FOR 2003

 

STREAMLINING & BODYWORK

There must be no possibility of any streamlining coming into contact with the road surface, impeding the front wheel or steering of the machine due to the failure of any individual fairing mounting point.

 

RED REAR WARNING LAMP (SIDECARS ONLY)

All sidecars must be equipped with a functional rearward facing rear lamp. The light must be installed at the rear of the main body and mounted above the driving wheel at a minimum of 40cm above the ground. The lamp must be visible at all times. The lamp should use a 10 watt conventional bulb output or equivlant.