would be interested to know if and how you fix this symptom. my bike is similarly configured and no matter how i adjust both the AIV and/or the fuel trims the popping on decel is intense... i know some is expected but the amount I have is unreasonable. I have even taken measures to use sealant on exhaust joints where i might have a leak.
2011 Victory Kingpin 8-Ball
Tach / Dual front discs with Vesrah JL pads / Penske shock / S&S Intake / PCV & autotune / RPW Thor exhaust with homemade custom baffle / Tsukayu leather "Strong" bags / Avon Cobra *Radials* / Ness Vegas Peg Conversion / Ness Vegas driver's seat / Custom T-Apes from BR Custom Cycles