Parts such as the Rear Wheel/chain/coupling: Indicator, Nut,cap,10mm, Dust Shield-brake Cam, Lever Rear Brake Cam are included in the En500a2 Vulcan500 1991 Usa California Canada Rear Wheel/chain/coupling parts fiche.
The Rear Wheel/chain/coupling is made up of components including this Wheel-assy,rr,c.gray+ which is the most expensive.
Check out any of the thirty Rear Wheel/chain/coupling components enlisted.