Hi all...I am restoring a 1941 m20 that has a three speed gear box. The gear box looks exactly like the JHL four speed box. I fairly sure that the m20's where not produced with a three speed box. Does anyone know the history of the BSA three speed gearbox?
It has no gear change indicator plate, but you could be right that its a three speed plate on a four speed box. Only one way to find out, I will take off the inspection cover. Thanks four the replys.