Parts such as the Rear Calipers: Piston Set, Seal,piston, Shim,rr Caliper, Bolt are included in the Gsx1100e 1983 (d) General Export United Kingdom (e01 E02) Rear Calipers parts fiche.
With two applications this Pad,brake is the most specified part.
The component with the lowest price in the REAR CALIPERS schematic is the Bolt.