Some items from this specific schematic: Washer-thrust,25mm, Circlip, Gear,input 3rd&4th,21, Bushing,input Shaft.
This schematic depicts all components used in the Kz550h2 Gpz 1983 Usa Canada Transmission partslist.
On this parts fiche the Washer,toothed,28.3x3 is the most specified component.