Not sure what you have in there now - you would have to take it apart and check.
Your stock jetting is HORRIBLY RICH and was:
Needle: R1368
Main: 165
Pilot: 42
Slide Cutaway: 5mm
You can view microfiche for your bike at
www.buykawasaki. com No sure if this will work, but the carb fiche is here:
https://www.kawasakiepc.com/SystemS...=Model&cGroupID=&CFID=787170&CFTOKEN=71885019
In addition to leaning out the jetting as recommended by the previous posters, you can also replace the slide with a 6mm cutaway, or carefully grind about 1mm off of the bottom of your stock slide.
Rejetting your bike will make it run much better and reduce the spooge. Another cheap trick is to use a head gasket from an '88 KX250. This will raise the compression some for more low end power, and the bike will still run fine on pump premium fuel.