Parts such as the Crankcase Cover: Cover,clutch, Gasket(13.8x18.8x4.8) (nas), Bolt, Bolt are included in the Gz250 Marauder 2000 (y) Usa (e03) Crankcase Cover parts fiche.
The twenty-eight Gz250 Marauder 2000 (y) Usa (e03) Crankcase Cover component parts are all listed in this schematic.
On this parts fiche the Bolt is the most specified component.