Triumph / BSA Singles Kickstart Ratchet Pinion Gears (1) - Choose Gear Type Part # - Specs - Application:#57-4336 - (3/4" ID) - TR5MX / B50MX / B50 ONLY 1971-1974 etc) from the 1950's through

etc) from the 1950's through the 1970's

Made in England - ready to be installed

and Norton lightweight models such as the Cub

Fits all BSA A65 unit twins (Lightning

Also fits many A & B Group BSA Pre-Unit Twins & Singles that feature the "Cross Over" Rear Brake with the Ariel Style Hubs up to 1963

Triumph / BSA Singles Kickstart Ratchet Pinion Gears (1) - Choose Gear Type Part # - Specs - Application:#57-4336 - (3/4" ID) - TR5MX / B50MX / B50 ONLY 1971-1974 etc) from the 1950's throughNew Triumph and BSA unit singles kickstart ratchet pinion gears. Both variation of pinion gears are made in England and will replace both BSA and Triumph part numbers 57 4336, T4336, 57 2683, T2683 and 40 3271 Fits most unit singles (with side points) from 1965 1973 including the B25, C25, C15, B40, B44, B50, TR5MX and others (excluding the Triumph Cub). Please check your parts book and bore size prior to ordering pistons.. Please note that this gear