i have a 2002 400ex white bros e series slip on and k&n filter and a k&n filter box lid and i moved the needle clip to #4
on the needle and i am 2 1/2 turns out on the f/a mix screw
165 main jet runs better but still poping @1/4 throttle
am i even close or what first time doing this i am at a lost but it is getting better since the last post

getting better i came out 2 turns runs good but backfires when i let off can any on help!!!!!!!!!!!!!!!!!!
still have the 170 jet

how many turns should i start with right now i am at 1 1/2 turns it was at 2 1/2 turns runs better at 1 1/2
still dont know if its right still popping a little i just want to make sure i dont burn anything up

ps thanks to all helping me i am a newbe but larning alot from u guys thank so much

i have a 2002 400 ex with a white bros slip on k&n filter and k&n box lid
the kit came with a 168 and a 170 main jet just wanted to know where should i bee on
fuel air mixture it was at 2 1/2 turns out and it was running crappy so i turned it in 1 full turn
is that OK  

as you can tell i dint know what i am doing but i am hand and wanting learn