The Washer,6.5x20x1.6 is the most widely applied product in the KZ1000A2 KZ1000 1978 CANADA TAILLIGHT ('77-'78 A1/A2/A2A) ( five times ).
The lowest price component in this Taillight ('77-'78 A1/a2/a2a) parts-list fiche is the Washer-spring,6mm.
A sample from the products for the Taillight ('77-'78 A1/a2/a2a) include: Bolt, 6x22, Collar,6.8x10x8.5, Damper, Bulb,12v 32/3cp.