The most reasonably priced component used on the Xl500s 1979 (z) Usa Cylinder Head is the Screw,pan,5x25.
The Washer,8mm is the most widely applied product in the XL500S 1979 (Z) USA CYLINDER HEAD ( four times ).
Some items from this specific schematic: Gasket,cylin.head (mca), Plug,spark (x22es, Plug,spark, Gasket.cylinhead (mca).