The most reasonably priced component used on the Gsxr750r 1989 (k) (e01 E02 E04 E22) Front Calipers is the Bolt 10x30.
This Caliper Assy,rh is the most expensive of the items that make up this Front Calipers assembly.
Some items from this specific schematic: Caliper Assy,lh, Seal, Seal, Boot,piston.