hi i have an 01 400ex with 440 kit 4mm crank to make it a 460 stroker i have a race carb cam everything it has like nothing stock but i got it a few weeks ago it ran ok when i got it now it will rev up fine but when i go to take off it keeps missing alot in every gear what might it b ?? i took off the carb and gave it a good cleaning so i dont think thats tho problim i just dont get it y dose it only do it when its in gear when im going down the road and it dose it i can pull in the clutch and rev it up and it revs fins i drop the clutch back out and it just keeps missing please help thanks dan