Overhauling a tired engine inevitably requires attention to the cylinder-head, valves and camshaft drive train. Also pay close attention to the valve guides, the most likely cause of a smoky exhaust, especially on start-up.
This component, and probably a fair few of the parts listed below maybe required for a fully satisfactory outcome. Remember, interfacing new parts with old can cause premature wear to those (possibly expensive) new parts!
Add as many items as you wish to the same shopping cart, new head-gasket 110041159 valve stem oil seals 920491062 & O-ring seals 670D2010670D2021 for example, and still only pay the same single fixed price shipping cost.
This component will almost certainly have other applications within the Kawasaki model range; please check the part-number is right for your machine prior to ordering?