Parts such as the Rear Brake Caliper: Pin,bolt, Bracket Comp,rr, Pin,bolt, Bush,pin are included in the Gl1500c Valkyrie 1998 (w) France Rear Brake Caliper parts fiche.
Of all the components that make up this Rear Brake Caliper the Cap,bleeder has the lowest price.
In this schematic the "Seal Set,piston" is used most often.