After alot of time, money, and posting on this forum, my bike runs good now! The real problem was my porting. I got a new cdh power cylinder, and now it's good. But now I'm back to square 1. I want more speed and power. It only goes like 20mph at the momment. I'm going to put a high compression head after I break it in a little more. I have a 38t sprocket, an nt carb with an hp carb air filter, a small mz65 clone with a muffler, an ngk plug and that's it. What are the best upgrades I can do? I should know this but I want some advice on what I can get the most power from.