Suitable for all 500cc unit engines. Ready for STD pistons.

Gearbox sprocket for all unit 350cc and 500cc twins, please select number of teeth
Triumph part numbers:
18T  57-1476
19T  57-1776
20T  57-1569
21T  57-1569

Very good quality unit 500cc 5TA, T100 pistons. (NOT T100R Daytona, these have a higher cam). New old stock from the early 70's, made in Japan for a Californian distributor that closed in the 80's. Come complete with rings, gudgeon pin and circlips.