Hello Everyone, My 06 wr450 easily wheelies 1st thrugh 3rd. I have to yank up in 4th gear and 5th ain't happening. I have done all the free mods and am looking hard at accelerator pump mods. But my question is, is there still a bunch of power left to tap with the stock muffler modified (unplugged & minus spark arrester). I've had the carb off 5-6 times playing around with needles/clip position and jet sizes to maximise A/F curve (JD Jet Kit & fuel screw). Will or should it pull up on one wheel in 4th or 5th gear? I don't want to waste a bunch of time tuning without a dynometer if there isn't much left to get. I know some of out there have tuned for ultimate power and performance. Also I have been running 93 octane gas. I am going to get some 95 octane, but some guys I've talked to say I'm crazy for not running/mixing leaded race gas.Thanks for your advice.