The component with the lowest price in the TRANSMISSION / REAR BALANCER schematic is the Bolt,hex 6x10.
Some items from this specific schematic: Sprkt,drive,14t, Mainshaft,trns, Plate,fixing, Bolt,hex.,6x10.
This schematic depicts all components used in the Xl500s 1979 (z) Usa Transmission / Rear Balancer partslist.