As used pre 1960 BSA with 6 spring clutch. OEM 42-3223, pre unit BSA B31 33 B32 B34 A7 A10. 42-3223 can replace 42-3224, 42-3060, 65-3922, 66-3908, 42-3054. 42-3223 : BSA clutch drum, clutch chainwheel complete ( for simplex 428 chain /1/2x5/16 chain).
