Parts such as the Front Master Cylinder: Screw,4mm, Lever-grip,front Brak, Holder-brake,master C, Hose-brake,fr are included in the Ksf250-a12 Mojave250 1998 Usa California Front Master Cylinder parts fiche.
On this parts fiche the Washer,10.5x15x1.5 is the most specified component.
The Bolt,flanged,6x10 is the lowest priced item on this Front Master Cylinder schematic.