The Crankcase is made up of components including this Set-crankcase which is the most expensive.
The most reasonably priced component used on the Ksf250-a4 Mojave250 1990 Usa Crankcase is the Screw-cntsnk Hd,6x16.
The forty Ksf250-a4 Mojave250 1990 Usa Crankcase component parts are all listed in this schematic.