In this schematic the "Cotter, Valve" is used most often.
The forty Cb550f Super Sport 550 Four 1975 Cb550fk0 Usa Camshaft / Valve / Tensioner component parts are all listed in this schematic.
Some items from this specific schematic: Nut,hex 6mm, Bolt,flange, Slipper,tensioer, O Ring,5.8x1.9.