The Honda SHIFT DRUM / SHIFT FORK / SHIFT SPINDLE has thirty-seven products enlisted in the schematic.
Some items from this specific schematic: Bolt,hex 6x20, Plate,stopper Cam, Oil Seal, 14x24x5, Bolt, Hex. (6x32).
The most reasonably priced component used on the Cb550k 1978 Usa Shift Drum / Shift Fork / Shift Spindle is the Spring,shift Arm.