Parts such as the Crankshaft: Key, Piston, Gear,primary Drive No.28, Nut are included in the Gs450t 1982 (z) Usa (e03) Crankshaft parts fiche.
Of all the components used in this assembly the Crankshaft is the most expensive.
The lowest price component in this Crankshaft parts-list fiche is the Circlip.