On this parts fiche the Bolt,sprocket is the most specified component.
Parts such as the Rear Wheel: Washer Rr Axle, Axle Comp,rr, Sim,driven Flange, Wire,nut Lock are included in the Vfr750r Rc30 1988 (j) Italy Rear Wheel parts fiche.
The lowest price component in this Rear Wheel parts-list fiche is the Pin,split,2.5.