In this schematic the "Bolt,flange,nshf," is used most often.
A sample from the products for the Right Crankcase Cover include: O Ring,48.1x3.6, Lever Comp,clutch, Bolt,flange 6x10, Cap,oil Filler.
The lowest price component in this Right Crankcase Cover parts-list fiche is the Bolt,flange 6x14.