The Washer(6a1) is the lowest priced item on this Clutch schematic.
Check out any of the twenty-seven Clutch components enlisted.
Parts such as the Clutch: Boss, Clutch, Washer (363), Primary Drive Gear Assy, Plate, Clutch 2 are included in the Yz250 1986 (g) Usa Clutch parts fiche.