Parts and Accessories for Vintage British and European Motorcycle
This is a brand new gearbox transmission sprocket.
Part # 57-4306 / 13T
Sprocket teeth: 13
Chain size: 520
Chain Pitch: 5/8″ X 1/4″
Fits: BSA B25, B44 ,B50 & C25 from 1965-73
Triumph TR25, T25 from 1968-71