Fits:
Triumph 500 & 650 Unit Twins (Bonneville, Tiger, Trophy, TR6, 6T, T120, T100C, Daytona, etc) up to 1969.
BSA 500 & 650 Unit Twins With "3 Spring Clutch" (Lightning, Rocket, Cyclone, Hornet, Spitfire, Firebird & Thunderbolt)
from 1966-1969 with the 3-spring clutch.