BSA Motorcycles 1930s

BSA 1940 Timing Gear

BSA-1940-Timing-Gear-Diag.jpg
This sketch clearly shows the very interesting and silent timing gear incorporated in several of the 1940 B.S.A.s. The cam pinions run on fixed posts which are pressed into the crankcase wall, whilst the steel plate shown carries an outrigger bearing for the main shaft.

BSA 1940 Models


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