If the engine is not running as it should, hesitant throttle pickup or poor starting, have you thought about a complete carburettor overhaul?
The part shown in the image is just one item of a few you may require to return to smooth running and first prod starting.
Other items you may wish to consider:
Add as many items as you wish to the same shopping cart, new screws 223AB0416225AB0418 plunger cap 160121051160121052 float valve 160301007 & float 160311056 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?