I have a 05 400ex.the top end was just built last week.now i am trying to get the carb strait.k&n filter and air box has many holes drilled in the top.when I first got it I was told it was a 440 and it ran like crap.i put 440 jets in the carb.i got it to run way better.well it was stock.i rebuilt the motor and left the jets in the carb.now it spits a little when cold .when its worm it is missing a little when almost wide open.what size do I really need? And just a FYI I’m in Alabama +650 elevation.