By ’61, the 650 was running a high-lift “357” camshaft from the Spitfire and an improved ... rather than a single carb like the 650 Thunderbolt. These all used BSA’s A65 unit engine ...

VINTAGE - 1905-1934 Due to the rarity of these years and models of BSA, pricing data is still being collected. BSA production ceased in 1973. It is not usual to find a BSA motorcycle titled and ...