Of all the components used in this assembly the Rectifier Assembly is the most expensive.
The most reasonably priced component used on the Gsxr600 1998 (w) Usa (e03) Electrical is the Screw(6x8).
Some items from this specific schematic: Cover,starter Relay, Spacer(6.5x10x7), Coil Assy,ignition, Screw(6x8).