don a can ken that one like mine is racin when I first start it up then calms down im replacing my jettin see what happens 
this is a common kawasaki issue, back when we raced two stokes it was always time consuming to get the jetting right, usually about 5 needle sizes, a needle is like a clip or half a clip difference, sometimes a slide change and always jet changes. As Motorrad stated only use Kehin jets, each jet is flow tested, others who knows. usually your bike is always a little bit lean on start up and may rev a little high till warmed up, but if you have to hurry to shut off your choke your probably to rich right off the bottom
