With a quantity of four pieces, the Bolt,flange,6x20 is the most used part in the CYLINDER HEAD COVER 81-82 diagram.
This part-list fiche shows all the components that make up the Xr500r 1981 (b) Usa Cylinder Head Cover 81-82 .
The most reasonably priced component used on the Xr500r 1981 (b) Usa Cylinder Head Cover 81-82 is the Washer Seal, 6mm.