The lowest price component in this Rear Brake Caliper parts-list fiche is the Clip.
Some items from this specific schematic: Caliper Assy, Breed Screw Kit, Brake Pad Kit, Front, Shim, Caliper.
twelve components are shown in this Fz750 1987 2kk Sweden 272kk-322e1 Rear Brake Caliper exploded diagram.