I have a 2002 wr 426, I have the grey wire removed from the plug, throttle stop removed and an uncorked exhaust. The bike has a dead spot for a split second when you twist it up quick, and when you slowly roll it on it starts to break up from about 1/2 to 3/4 throttle on up. I currently hav a 165 mj, 50 pj, stock obdrr needle in the 4th clip, air box lid on. Nothing I do seems to have much of an effect on the problem, I have installed Main Jets from stock to 175, now I'm back to stock, I've raised the needle, now I'm back to the stock clip position, and I,ve repeated all of these with the airbox lid on and off. The reason I have the 50 pj in now is because I could start the motor and rev it a couple of times and the header was glowing red right at the head, the larger pilot jet stopped this problem. Help Please!!!