07 nightster fuel pak

have 07 nightster w/
heavy breather air cleaner
v&h shortshots
and v&h fuel pak
have back fire on decel and low end hesitation i am mapped at fp-0681 is a solution to this problem any help would be great thanks.

Do you have the baffles in the pipes if not I bet that is most if not all of your problem, you need some resteriction. Todd

I recommend calling Vance & Hines directly. I have always found them to be very helpful. Their phone number is on the website.

Yes, call V&H. Loved my V&H Big Shots, but they were a bit loud. Tried the quiet baffles, re-mapped, ride sucked. Changed back to standard baffles, went back to old map, rides good. Re-map, just in case. V&H will walk you through. Good luck.