Some items from this specific schematic: Brake Pad Kit, Front (mca), Caliper Assy, Pin, Cotter (648), Disk, Brake.
The Washer, Lock is the most widely applied product in the XJ550 1981 4V8 EUROPE 214V8-300E1 FRONT BRAKE CALIPER ( six times ).
The Yamaha FRONT BRAKE CALIPER has twenty products enlisted in the schematic.