JUST PUT ON SET OF VANCE & HINES SLIP-ONS ON MY 2011 UTLTA LIMITED AND HAVE A POP ONCE IN A WHILE NOT ALL THE TIME. THEY ARE NEW AND I AM GOING TO TIGHTEN UP ON THE CLAMPS A LITTLE AND CHECK TO SEE IF THIS WILL STOP THE POP. ANY OTHER INFO ANY OF YOU GUYS CAN GIVE ME.

THANKS, CRASH

Tighten up on the clamps. Make sure that they are making a good seal. Let us know if that fixed the problem.

Could it relate to a bad or intermittent sensor?

how'd you make out?

I could be wrong but I am assuming that you are talking about "decel popping". Quite common and usually a result of a lean condition at specific RPMs. If you have a self adjusting fuel manager (mine is a PCV - Power Commander V), you can hook up to your laptop and try adjusting the ZERO throttle column in both fuel tables. I would add +5 in the 0% columns from 1000 rpms all the way up to the limiter to start with and see if that solves the issue. Adding fuel below 1K rpm might adversly affect idle. The theory is that adding fuel will assist in cooling the exhaust and assist in eliminating the decel popping.

Just my personal opinion.... Good Luck!

I also share this theory. By using differing exhausts, air filtration systems, super-tuners and downloads, I achieved cooling by enrichment. I believe the real problem is MoCo walking a fine line between performance at the consumer level and making EPA numbers as a corporation.

While we could sit here all day and talk about fuel, eventual water-cooling and antique engines, the problem for us is the individual bikes we own and our daily problems. After I did this same monkey-motion on my Sportster--which cleaned up some of heat problems--the mechanic and I discussed that my new download was probably the way the bike should have left the factory.

I equate these problems to buying a computer, but then having to install other 2.0 programs and "patches" to make the thing work. More to the point, I also believe that any Harley shop should recognize this member's issue and know how to fix it by rote.

I think it's all about EPA numbers.Sure they're building bigger displacement engines but are they really better performers or are they building bigger heat exchangers from the EPA restrictions placed on them ?

SORRY I HAVE NOT GOT BACK ON SOONER. DID PUT A TURN ON THE CLAMPS AND ALL IS WELL.
THANKS FOR THE FEED-BACK.

CRASH

You mean HeadMaster had the answer!?!
Maybe he's not just a computer jockey after all...