ive got a 2000 400ex and i just got done with a rebuild 406kit wuth stage2 hotcam. and for some reason i am running extreamly rich !?!?!? got black smoke and is sputtering and bogging down from about 1/8th throttle to 3/4. WOT runs great....i already adjusted the needle jet and it is running a little better but still sputters/bogs real bad at low throttle [img]i/expressions/face-icon-small-sad.gif[/img]