The thirteen Gsx600f Katana 2003 (k3) Usa (e03) Seat (model K3) component parts are all listed in this schematic.
Parts such as the Seat (model K3): Bracket,seat Support,right, Cushion,rider Hndl(17x24x1.5), Bolt.muf Sprt F, Washer(8.5x24x2.3) are included in the Gsx600f Katana 2003 (k3) Usa (e03) Seat (model K3) parts fiche.
The Seat (model K3) is made up of components including this Seat Assy which is the most expensive.