Hi long time reader first post! I have a 2002 400ex with Yoshi full exhaust, uni filter,stage 2cam,170 main 38pilot 3 turns out on fuel screw and needle on 3rd from top. My problem is after installing the cam I have a sputter at 1/4 throttle or less. I know this is the idol circuit and I have tried everythinf from 1 1/2 turns on the mixture screw to 4 turn with no difference. once I am past 1/4 throttle It runs fine but I cant get rid of the popping and missing in the 1/4 throttle range…. Any help would be appreciated. and I have cleand the carb with cleaner and compressed air.