I almost had the pwk tuned the mid range was a little lean.I did a bunch of wide open runs and never  lock the motor  up.I have to have a air leak, the idle would be fine and then it would jump 1000 to 1200 rpms from idle  on me. After i would run it hard.Or after i would sit for a few seconds it would idle fine then jump up really high then sound zingy and lean..I built a leak down tester last night.Doing  my test in a few minutes.But the quad would pull harder then it ever pulled .Then a couple run later same setup it wouldnt  pull good at all.. I could not believe how fast Scp pipe got on its power.if i get it tuned right every quad on my  block better watch out for the old lt250r!!!!
What carb you run Iceracer !!