fifteen components are listed in the schematic for this Gsx1100e 1985 (f) (e01 E02 E04 E21 E22 E24) Rear Calipers .
The most reasonably priced component used on the Gsx1100e 1985 (f) (e01 E02 E04 E21 E22 E24) Rear Calipers is the Bolt 10x28.
With four applications this Bolt,caliper is the most specified part.