Gee, I wonder why you are getting popping...

 

true - one doesnt have to remap on exhaust mods because as somebody did say, you havent changed the A?F ratio,.

false- you need to remap if you install a free flowing AC.

the reason isimple, the stock efi sytem is closed loop. it will adjust for the lean mixture. also keep in mind that the epa thing is only for low rpm and idle. and thats wht the closed looop is for. epa donst test beyond that. harleys have traditionaly run rich at mid throttle to wfo. i have a 2008 dyna c with air cleaner and slip on mods. i never remapped and the bike is fine thri 4k plus miles.