Ok so I am having a huge problem that neither I or a friend who works on bikes can figure out. I have a 2005 CR250 that was running great then took it out and started loosing power. So the bike starts 1st or 2nd kick every time and when you pull off it runs great until it gets into higher RPM's where it gets a MAJOR stutter. the mechanic friend found that when you run it then shut the gas off it seems to run a little better as it runs out of gas if that helps. Just put in a brand new CDI box thinking that was the problem and that's a no go. Then I bought a new JD air striker pwk Carb with JD jetting thinking it was a jetting/ carb problem and no go.. same issue.. he checked the reeds and all looked good. power valve seemed to work fine but if I know correctly now that I have changed the carb it takes out the TPS since its unplugged.. changed the Plug 3 times so not that either. running 32:1 gas so that's not the problem. ANYTHING will help at this point... Thanks in advance !!!