Some items from this specific schematic: Panel Sub Brake, Spg Brake Arm Rtn, Pin Cotter 2.0mm, Shoe Set,brake (nas).
In this schematic the "Shoe,rear Brake (mca)" is used most often.
The twenty-seven Xl500s 1979 (z) Usa Front Brake Panel - Xl500s 79-81 component parts are all listed in this schematic.