The thirty-six Xr600r 1985 (f) Usa L. Crankcase Cover 85-90 component parts are all listed in this schematic.
On this parts fiche the Bolt,flg.soc.6x35 is the most specified component.
The Bolt,flange,6x14 is the lowest priced item on this L. Crankcase Cover 85-90 schematic.