Parts such as the Rear Master Cylinder: Rod-assy-brake, Hose-brake,rr, Ring-snap,20.5mm, Clamp,hose are included in the Kl650a3 Klr650 1989 Usa California Canada Rear Master Cylinder parts fiche.
The lowest price component in this Rear Master Cylinder parts-list fiche is the Pin-cotter,2.0x15.
The Rear Master Cylinder assembly is constructed from several parts from which the Master Cylinder Assembly is the most expensive.
