hi, names steve. got a 99 zx6r with full muzzy. heres the deal, it would beat my buddies o3 r6 no prob and pull on him with stock exhaust. put on full muzzy. he pulls on me now. i tried dynojet jet kit, would not run right with any jet or needle clip combos. put back in stock stuff and ordered factory jet kit. tried factory kit and still cant get rid of hesitation/dead spot around 5000-6000 rpm. originally had 137.5/140 mains. right now has 135/137.5 mains. cant get rid of dead spot at all. worse when really hot. plz need help, been trying for like a week to get this bike straghtened out. thnx in advance for help! oh yea, mixture screws out like 2 and 3/4. got good top end around 8k and up rpm, and good from 0 to about 4800 rpm. factory pilot jets installed out of kit, i think 17.5.