Parts such as the Turn Signal Lamp (e2, E21): Cushion, Bulb 12v 21w, Wire,turn Signal Lead, Bracket,rear Turn Signal are included in the Gsx1100 1981 (x) General Export (e01) Turn Signal Lamp (e2, E21) parts fiche.
On this parts fiche the Screw is the most specified component.
The Screw is the lowest priced item on this Turn Signal Lamp (e2, E21) schematic.