The sub assemblies and components that make up this Rr. Brake Master Cylinder (cb1300a/cb1300sa) include this Sub Assy,rear M/c, the most expensive part.
On this parts fiche the Washer,oil Bolt is the most specified component.
The component with the lowest price in the RR. BRAKE MASTER CYLINDER (CB1300A/CB1300SA) schematic is the Pin,spring,2x10.