Hi Brian. There is no jet kit for these bikes. The standard idle jet is 15 and main jet is 125. I had same issue as you. I fitted a #17.5 idle jet and 130 main and lifted needle 0.7mm. Fixed it. Search this thread and you'll see my journey tuning it. I also ran a Uni filter foam filter and i've made a Uni foam filter which I have not run yet. I run the stock exhauste. I'm in Christchurch..where are you?