Parts such as the Front Fork: Cover-fork,lh, Ring-snap, Seal,fork, Guide,fork Cover are included in the Kz650f1 1980 Usa Canada Front Fork parts fiche.
The most reasonably priced component used on the Kz650f1 1980 Usa Canada Front Fork is the Washer-spring,8mm.
This FRONT FORK assembly utilises seven Washer-spring,8mm(s) - the highest specified component.