If the water-pump (more correctly called coolant pump) has suffered from the problems associated with use of incorrect coolant - tap water(!) - for example, then it is possible that it may require some attention to bring it back to full efficacy.
This component and perhaps some of those listed below maybe required:
Add as many items as you wish to the same shopping cart, new bearings 920451235 & mechanical seal 490631055 (please note these components have a number of applications) for example, and still only pay the same single fixed price shipping cost.
Pro-workshop gasket sealant 08C70K0234M - once you have tried this you probably won't wish to go back to your old brand!
This component may have other, sometimes unrelated, applications, within the Kawasaki model range. So, please always check by the part-number rather than the description prior to ordering.