The most reasonably priced component used on the Gsx1100e 1984 (e) (e01 E04 E06 E21 E24) Front Master Cylinder (gsx1100ee/ef/eg) is the Screw.
On this parts fiche the Screw is the most specified component.
The Gsx1100e 1984 (e) (e01 E04 E06 E21 E24) Front Master Cylinder (gsx1100ee/ef/eg) consists of nine pieces with the Cup Set,master Cylinder being the most expensive.