https://www.obsoletebikeparts.com/product/triumph-t100a-gear-cluster-cplt-57-1406-57-1479-etc/
Triumph T100A gear cluster cplt. 57-1406 / 57-1479 etc - Obsolete Bike Parts
Triumph T100A gear cluster cplt. 57-1406 / 57-1479 etc - used, in very good condition c.w. cam plate and gear selector forks fits all 350 - 500 unit twins...