In this schematic the "Bolt(8x21)" is used most often.
Parts such as the Front Wheel: Disc,front Bra, Balancer,wheel(30g), Balancer,wheel(10g), Bolt(8x21) are included in the Gsx600f Katana 2004 (k4) Usa (e03) Front Wheel parts fiche.
The Front Wheel assembly is constructed from several parts from which the Wheel,fr(17m/cxmt3.50) is the most expensive.