The Taillight is made up of components including this Tail Lamp which is the most expensive.
Some items from this specific schematic: Damper, Gasket,tail Lamp Lens (nas), Nut,flanged,6mm, Washer,6.5x20x1.6.
fourteen components are shown in this En500a3 Vulcan500 1992 Usa California Canada Taillight exploded diagram.