Part of engine rebuilding should include careful inspection of the crankshaft/con-rod/piston assembly as well as the crankcase seals and replacing any parts that are worn or damaged.
This will restore the full (and substantial!) performance of the engine this component suits.
Other related components you may wish to consider:
Add as many items as you wish to the same shopping cart and still only pay the same single fixed price shipping cost.
Pro-workshop gasket sealant 08CRAHLG120G; easy to apply and with excellent results!
This component may have other applications within the Kawasaki model range, so please make sure you order the correct part number for your application.