Notice from the BSSO Technical Team for all LCGB Production Evo Class Riders:
At the recent BSSO AGM the Lambretta ‘type specific’ SIL200 gearbox was questioned over its suitability as a race gearbox. A few riders expressed a potential safety issue over its use in that your riding style, if not adapted to the correct gear change timing, can promote faster deceleration than anticipated due to the large ratio gap between third and second gears (compared to an LI150 gearbox).
After careful consideration the BSSO Technical Team would like to reaffirm that the nominated SIL200 gearbox remains a robust gearbox with no known durability concerns. It was chosen by the Production Class originators for its availability and price, and to maintain a level playing field across all riders.
In response to the information provided at the AGM, we intend to brief all new Production Evo Class riders on the gearbox characteristics and that a potential change in riding style needs to be adopted. The riders must familiarise themselves with the correct gear change timing in that you require to decelerate to a road speed suitable for selecting second gear. We would expect this to quickly become second nature, a characteristic of the machine operation.
As an added measure, during the forthcoming BHR Practice Day at Mallory Park 18th March 2016, we intend to closely monitor the situation, gathering feedback from all participating riders.
Please also note the Dellorto 30mm PHBH carburettor has recently been added to the Lambretta Evo Class regulations, originally omitted in error. And in response to recent enquiries, we have since made the rules clearer in regards foot-pegs (not allowed) and that only a combination of gaskets supplied with each type specific cylinder kit may be utilised.
An updated release of the rules are now available to download via the BSSO website.
BSSO Chief Technical Chairman