On this parts fiche the Damper is the most specified component.
A sample from the products for the Secondary Shaft ('81-'82 H1/h2) include: Circlip-type-c,28mm, Bushing,20x25x16.6, Coupling,inner,second, Coupling,outer,second.
nine components are shown in this Kz650h3 Csr 1983 Usa Canada Secondary Shaft ('81-'82 H1/h2) exploded diagram.