This Crankshaft - Piston diagram displays the required parts for the Bw80 Big Wheel 1986 (g) Usa Crankshaft - Piston.
On this parts fiche the Washer, Crank Pin (1h9) is the most specified component.
The Crankshaft - Piston is made up of components including this Crankshaft Assy which is the most expensive.