loping when decelerating

[steve0913]

???I just did a cadman kit and put on a Vance and Hines Fuelpak and have tried several different settings to get my 07 Nomad running right but when I am slowly decelerating going down an incline my bike lopes or jerks whatever the right word would be for it, I am running Vance and Hines Baggers and am trying to set it up to run unbaffled but even with the baffles in it still wants to lope just not as bad, also when I have the bike running in neutral and hold the throttle in one position it dont run steady it kinda surges, if anyone has any ideas please let me know, Im starting to think I just spent alot of money and time for a headache ???