With four applications this Spring,brush is the most specified part.
This schematic depicts all components used in the Cb550sc Nighthawk 1983 (d) Usa Starter Motor / Starter Clutch partslist.
The most reasonably priced component used on the Cb550sc Nighthawk 1983 (d) Usa Starter Motor / Starter Clutch is the Nut,thin 6mm.