BSA GOLDEN FLASH

[emilios]

Hi
Can someone tell me the right sprocket for a standard Golden Flash plunger 1952
I'v been told that gearbox is 19 teeth and rear wheel 42 teeth...but what about clutch and crankshaft?

[Goldy]

According to Roy Bacons BSA  twins and triples, the gearbox and rear wheel are as you say. The engine is 27 and the clutch 54. The engine sprocket or course gets changed according to the type of performance required.