The Crankcase is made up of components including this Crankcase,lower which is the most expensive.
Parts such as the Crankcase: Bolt,flange,6x40, Bolt,flange, 6x32, Orifice, Oil, Bolt Flange 8x70 are included in the Xr250 1980 (a) Usa Crankcase parts fiche.
With all the components that make up the XR250 1980 (A) USA CRANKCASE assembly. The Bolt,flange, 6x32 is the most frequently specified with eight applications.