New BSA 500 and 650 unit twins front gear box drive sprocket. This EMGO sprocket is the same quality as the "English made" types for half of the price. Sprocket accepts a standard 530 or 5/8" X 3/8" chain. Fits all BSA A50 and A65 twins (Lightning, Royal Star, Hornet, Thunderbolt, etc) from 1962-1972. Please refer to your parts catalog for proper fitment.
Use the drop down menu to select which size sprocket you desire.
•Made by EMGO
•O.E.M Part number is 68-3073 & 68-3089
Free shipping in the USA