CRMC Announcement
We are also pleased to announce development of the Sidecar Period 4 rules. Sidecar rules have remained static for several years, so this change allows certain production and Grand Prix 2 stroke engines (plus some some 8-valve 4-stroke engines) to be used:
Production Based Engines (all limited to 750cc):
• Suzuki T500 air cooled twin cylinder two stroke,
• Suzuki GT750cc water cooled three cylinder two stroke.
• Suzuki GS 750cc 8 valve double OHC air cooled four cylinder four stroke.
• Kawasaki 500/750cc air cooled three cylinder two strokes.
• Kawasaki Z2 750cc 8 valve DOHC air cooled four cylinder four stroke engine.
Grand Prix Engines (limited to 500cc):
• Konig 500cc Water Cooled Flat Four Two Stroke.
Note – Other post 1972 (1970’s) engines may be eligible by request and discussion with the Sidecar Eligibility Officer
If you have any questions, please contact one of the eligibility officers, who will be glad to help.
I have extracted the relevant bits out of the 2019 Eligibility Book, the whole thing is available on the CRMC website.
PART 14 - SIDECAR ELIGIBILITY GUIDELINES
CLASSIFICATION - Sidecars will be classified by Engine Type into "Period 1", "Period 2",“Period 3” and for the 2019 season “Period 4” is being developed.
Period 4 – Will be developed for the 2019 race season and will be for the following production engines all limited to 750cc and for the following GP engines limited to 500cc.
Production Based Engines;
• Suzuki T500 air cooled twin cylinder two stroke,
• Suzuki GT750cc water cooled three cylinder two stroke.
• Suzuki GS 750cc 8 valve double OHC air cooled four cylinder four stroke.
• Kawasaki 500/750cc air cooled three cylinder two strokes.
• Kawasaki Z2 750cc 8 valve DOHC air cooled four cylinder four stroke engine.
Grand Prix Engines;
• Konig 500cc Water Cooled Flat Four Two Stroke.
Note – Other post 1972 (1970’s) engines may be eligible by request and discussion with the Sidecar Eligibility Officer.
Note – Frame/Forks/Wheels/Tyres/Brakes/Fairings/Carburation/General Appearance will all be as current classic sidecar eligibility rules.
Note – REED Valves can be used in Period 4 two stroke engines.