40-3121 40-3050 57-2702 Sprocket Lockwasher – BSA
Gearbox Drive Sprocket Lockwasher as fitted to BSA A50 & A65 Unit Twins (Lightning, Thunderbolt, Rocket, Wasp, Spitifre, etc) from 1962-72. Also fits all BSA & Triumph Unit Singles (C15, SS80, SS90, B40, B44, TR25W, Victor, etc) from 1959-72.
MADE IN ENGLAND
OEM: 40-3121, 57-2702, 40-3050
