HELP? Have new 2008 1200 Sportster custom, had Rhineharts put on with Stage 1 PC, Dealer put them on, the bike ran awful, popping and backfiring, this was after it had been mapped and put on Dyno. Finally shipped us out the door, went to a Victory dealer and he put it on Dyno again, running 95% better. The only question is warm air coming out of the right&nbsp\\;side of seat and do we need to hook up 02 Sensors or just leave them out? Anyone heard of these problems?[&o]

 

???? are the O2 sensors there?? If so are they hooked up?? You can remove them of you have a Powercommander fuel module and replace them with bung hole plugs so there isn't any exhaust leaks up near the heads just make sure you put some anti-cease grease on them before installing into the holes.
Bone

 

Thanks, they are unplugged right now, but think am going to put the Cobra on because people have said the 02 sensors should be plugged in, in case of future problems that might arise with them not plugged in.