im up against the ropes on this one. 07 k9, 117 motor, Vance and Hines big radious pipes. Word is mixture needle should be out 11/4 to 1/12 ball park. I noticed mine is out almost 3 turns. I do notice raw fuel in the exhaust when I first get it out of the garage, but it runs very nice. Problem is when I bring the needle in closer to text book settings, bike pops and cracks terrible on deceleration. Carb is jetted correctly with a 32 mid jet, and I've done the intake leak test useing carb cleaner. Doesn't seem to have any. Any help would be great. Also are these pipes known to be bad for that. I'm assuming I'm running it really rich just to stop the decel pop !