"05" wr450 all free mods done #48 pilot yzneedle clip position 4 screw 2 turns out. with the motor warm "sometimes" with the first touch of the throttle she dies .Starts right back up fine but may or may not die at the first touch again. Mabe 30% of the time it will die. Whats up with that!!!! Otherwise she rips!! Also ais removed and thest of the jets are stock. Any advice would be great!!