Parts such as the Electrical: Clamp(l:165), Coil Assy,ignition, Fuse(30a), Wire,battery Minus are included in the Gsx600f Katana 1999 (x) Usa (e03) Electrical parts fiche.
The component with the lowest price in the ELECTRICAL schematic is the Screw(6x8).
With four applications this Spacer(6.2x12x14) is the most specified part.