The Bolt, Hexagon (1l9) is the most widely applied product in the XS650S 1979 USA DOUBLE DISC BRAKE ( six times ).
The Double Disc Brake assembly is constructed from several parts from which the Caliper Assy is the most expensive.
Parts such as the Double Disc Brake: Caliper Seal Kit, Cap, Indicator, Boot, Caliper, Bolt, Caliper Support (3g1) are included in the Xs650s 1979 Usa Double Disc Brake parts fiche.