The thirty-one Gsx1300bk Bking 2008 (k8) Usa (e03) Clutch component parts are all listed in this schematic.
The Bolt is the cheapest item from this partsfiche.
Some items from this specific schematic: Spring,clutch, Disc,clutch Pressure, Bearing(35x40x39.8), Plate,clutch Drive No.3 (nas).