Parts such as the Primary Shaft: Circlip, 30m/m, Collar,p.gear, Washer,stopper, Washer,8.2mm are included in the Cb750sc Nighthawk 750 1983 (d) Usa Primary Shaft parts fiche.
The Primary Shaft assembly is constructed from several parts from which the Shaft,primary is the most expensive.
With eight applications this Rubber,damper is the most specified part.