Of all the components used in this assembly the Cylinder Assy,mstr,rr is the most expensive.
Parts such as the Rear Master Cylinder/brake Pedal: Shaft,brake Pedal, Nut,cap,lock,8mm, Cover-seal, Collar,brake Rod are included in the Kz650d2 Sr 1979 Usa Canada Rear Master Cylinder/brake Pedal parts fiche.
On this parts fiche the Washer,10.5x15x1.5 is the most specified component.