The twenty-six Ksf400-a3 Kfx400 2005 Usa Rear Brake(a2/a3) component parts are all listed in this schematic.
The Spring is the cheapest item from this partsfiche.
Parts such as the Rear Brake(a2/a3): Pad-assy-brake (nas), Breather, Cap-breather, Packing,piston (nas) are included in the Ksf400-a3 Kfx400 2005 Usa Rear Brake(a2/a3) parts fiche.