The most reasonably priced component used on the Gsxr750x 1986 (g) (e01 E02 E04 15 16 17 18 21 22 24 25 34 39 53) Electrical is the Screw.
With four applications this Screw is the most specified part.
The Electrical is made up of components including this Coil Assembly,ignition which is the most expensive.