The component with the lowest price in the REAR BRAKE MASTER CYL. schematic is the Screw,washer,4x12.
Parts such as the Rear Brake Master Cyl.: Collar,fr.fender, Conn Master Cyln, Bolt,flange 6x14, Washer,oil Bolt are included in the Gl1100 Goldwing 1980 (a) Usa Rear Brake Master Cyl. parts fiche.
The Rear Brake Master Cyl. is made up of components including this Cyln Assy Rr Brk which is the most expensive.