The Screw is the lowest priced item on this Electrical schematic.
Parts such as the Electrical: Nut, Cap Assy,spark Plug, Seal,spark Plug Cap, Washer,lock are included in the Gsx550e 1985 (f) (e01 E02 E21 E22 E24 E34) Electrical parts fiche.
The sub assemblies and components that make up this Electrical include this Coil Assembly,ignition, the most expensive part.