my buddy has an 06 banshee stock carbs with 340 main stage 2 needle kit from dyna jet stock pilots clip set at 5th position have alot of porting and a milled head fmf fatty pipes with power core silencers and power lid just got porting done put it back together with this set up and if i hit th throttle lightly the rpms stay up tap it againa and it comes down to perfect idle it only happens when i give it a little gas could this be his needle hight or pilots or do you think his carb or carbs might be hanging up