Some items from this specific schematic: Caliper Assy., Plug,pin, Dust Seal, Pad Comp (nas).
The most reasonably priced component used on the Xr350r 1986 (g) F-8-1 Front Brake Caliper(xr350re.rf.rg) is the Nut,flange,8mm.
The F-8-1 Front Brake Caliper(xr350re.rf.rg) is made up of components including this Caliper Assy. which is the most expensive.