keeps popping!!!!

[yfzcrazy]

Ok i have a 2006 yfz450. I have instsalled the dyno jet kit for my elevation, FMF factory4 full exhaust, Velocity air filter with air box removed and a new fuel screw!! Ok now every time Iam letting off the throttle it starts popping and when ever you shut it down it pops too what do i need to do to correct this?

If it pops when you shut it down thats extra gas left in the cylinder egniting so its getting to much gas.

put the air box and stock filter on and get the main jet correct. Once its correct then remove the air box and switch filters and adjust the needle or fuel screw and posably pilot.

[yfzcrazy]

ok i will give it a shot thanx