With a quantity of two pieces, the Bulb(12v18w) is the most used part in the TURN SIGNAL LAMP diagram.
Parts such as the Turn Signal Lamp: Plate,rr Turn Signal,l, Lens, Nut, Relay Assy,turnsignal are included in the Gsxr600 2005 (k5) Usa (e03) Turn Signal Lamp parts fiche.
The Screw is the cheapest item from this partsfiche.