Parts such as the Starter Clutch: Pin(7.4x13x56), Roller(15x13), Gear,starter Idle, Spring are included in the Gs1000 1978 (c) Usa (e03) Starter Clutch parts fiche.
The most reasonably priced component used on the Gs1000 1978 (c) Usa (e03) Starter Clutch is the Spring.
Of all the components used in this assembly the Clutch Set,starter is the most expensive.