The component with the lowest price in the REPAIR KIT 1 schematic is the O-ring(6r7).
The Yamaha REPAIR KIT 1 has twenty-six products enlisted in the schematic.
Parts such as the Repair Kit 1: Oil Seal(6m6), O-ring(6r7), O-ring (688), Gasket, Exhaust Outer Cover (nas) are included in the Wb760v Wave Blaster 1997 Repair Kit 1 parts fiche.