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Also fits BSA A7 & A10 models with the 4 Spring clutch from 1960-1963
and others from the 1950's through the 1970's
We stock (2) types of tachometer drive assembly's
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BSA Singles Kickstart Quadrant 3/4" 57-4070 - 1968-70 A65 Also fits BSA A7 &New BSA Singles Kickstart Quadrant. Replaces BSA part number 57 4070 quality is superior over the original BSA kickstart quadrants hardened steel. Needle bearing not included. Quadrant is the 3 4" variety suited for BSA & Triumph unit singles (B25, TR25W, B44, etc) from 1968 1970 only. Please refer to your parts catalog for proper fitment. Made in England O. E. M Part number is 57 4070, T4070, 57 2643, T2643, 57 4592 or T4592