The Kawasaki VALVE(S) has fourteen products enlisted in the schematic.
On this parts fiche the Collet,retainer is the most specified component.
Parts such as the Valve(s): Nut,rocker Arm Fiting, Seat-spring,outer, Screw-pan Head,6x10, Shaft-rocker are included in the Kvf300-b1 1999 Australia Valve(s) parts fiche.