TRX_450
06-21-2008, 11:52 AM
ive got a 400ex with an HMF slipon and a K&N intake (tube out of the carb with a filter and outerwares) no airbox either. ever since i put it on i have hardly no throttle response compared to what i used to and also if i jump and try to rev b4 i hit the landing it doesnt want to especially if i single something and try to gas it again over another single. im running stock jets now so i know its got to be my jetting but im clueless as to how big i need to go with what jets and so on. please help!