When overhauling the cylinder-head assembly, replacing as many of the wear items as possible will simplify the reassembly and subsequent adjustments required to set up the valve gear correctly. The most vital items include valve guides (one of those parts that often is never given a second thought!), the collets, valve seals, the valves and valve springs.
Inspect the cam lobes for wear or damage, likewise the cam-chain, guides and tensioners.
You may wish to consider these related cylinder-head/valve train components.
120040716
120050057
120050774
120320018
160070028
490780077
110040734
130CB0625
110080747
132720260
120460072
120460058
120480084
120530102
491180742
491180921
920570595
921531763
921540819
120530139
120530191
491180743
Add as many new parts to the same shopping cart as you wish, new retainers 120091073 collets 120111053 valve stem seals 920491349 & valve guides 490020009 for example, and still only pay the same single fixed price shipping cost. Important! Please be aware that this component will have other applications within the Kawasaki model range, so check the part-numbers you order are correct for your model and application. Engine work? Pro-workshop gasket sealant 08CRAHLG120G - easy to apply with professional results.