Parts such as the Rear Brake Caliper: Spring,pad, Caliper Sub Assy,, Cap,bleeder, Bush,pin are included in the Gl1500c Valkyrie 1997 (v) France Rear Brake Caliper parts fiche.
The Pin,bolt is the lowest priced item on this Rear Brake Caliper schematic.
The Rear Brake Caliper is made up of components including this Caliper Sub Assy, which is the most expensive.