The most reasonably priced component used on the Gsx600f Katana 2003 (k3) Usa (e03) Front Damper (model K3) is the O Ring(d:1.9,id:3.8).
Parts such as the Front Damper (model K3): Bolt(8x27), Seat,under, Spacer,spring, Ring,stopper(id:6.1,d:0.6) are included in the Gsx600f Katana 2003 (k3) Usa (e03) Front Damper (model K3) parts fiche.
On this parts fiche the Bush,guide is the most specified component.