CCM Fourstroke 500-580 MX BSA B25-B50 Triumph TR25W Gearbox sprocket 11/12/13/14/15T (57-4306)
Condition: N.O.S. Made in England
Fits all CCM MX Fourstrokes with 520 chain All BSA-Triumph 250-350-440-500 Unit Singles -1973
Choice of 11-12-13-14-15T
Made in England