So you are just replacing the main jets? I don´t have to install a full jet kit? My local kawasaki dealership said I couldn´t order just main jets but I did find a website that would sell mukino or whatever brand they are...I just don´t know what series carb is in the bike.
...I tried boreing out my main jets like you said and boy it did run a lot better but still pretty lame in general. My bike hasn´t been ran in at least 4 years. So it needs some love. I am waiting for a carb rebuild kit from the dealership...man, they take forever.