The most reasonably priced component used on the Z550g6 Gt550 1989 Europe Fg Sp Valve(s) is the Collet.
The Kawasaki VALVE(S) has thirty-four products enlisted in the schematic.
Parts such as the Valve(s): Shim,t=2.80, Shim,t=2.45, Shim,t=3.00, Shim,t=2.25 are included in the Z550g6 Gt550 1989 Europe Fg Sp Valve(s) parts fiche.