Hey guys i have a 2009 yz450f with an fmf 4.1 and megabomb header. I have had issues with the jetting on this bike since i changed the exhaust, i just put in a 165main jet and raised the needle 1 clip position, i had my fuel screw set at 2 3/8 turns. The bike pops alot of decel still but throttle response and overall power is better. But the bike isnt consistent and doesnt run great. Im not sure where to go from here to get it running great. I live in socal ride mostly milestone and lake elsinore. Any help would be much appreciated.