On this parts fiche the Screw is the most specified component.
Parts such as the Left Handle Switch: Cover,clutch Lever, Lever,starter, Screw, Lever Assembly,clutch are included in the Gr650x 1983 (d) (e01 E02 E06 E22 E24 E39) Left Handle Switch parts fiche.
The nineteen Gr650x 1983 (d) (e01 E02 E06 E22 E24 E39) Left Handle Switch component parts are all listed in this schematic.