The most expensive part in this assembly is the Panel, Rr. Brake.
The component with the lowest price in the F-10 REAR BRAKE PANEL schematic is the Washer 10mm.
With all the components that make up the XR500 1979 (Z) CANADA F-10 REAR BRAKE PANEL assembly. The Shoe,rr,brake (mca) is the most frequently specified with two applications.