I'm running a map I received from Fullsac when I purchased their X/D header pipe. It usually happens between 1800 and 2300 I would guess, generally when up shifting from 2nd to 3rd, but has happened from 3rd to 4th.

 

If the exhaust seals are intact, you might want to read up on' Decel fuel' adjustments for your tuner.

 

sounds lean , needs more fuel

 

Are you fully off the gas before you pull the clutch in. If I have the throttle open slightly when I pull in the clutch at speed upshifting I will some times get a POP.

 

In order to get rid of what most people refer to as backfire, you have to have 3 things present: air, fuel and spark.
Start with the easy fix first, which is cold air being sucked into a hot pipe which already has spark and fuel present. This can happen at decel or accel. It is fairly easy to tighten things up so this is the logical place to start.

If you are absolutely, positively certain there are no exhaust or muffler leaks (torque wrench is handy here) present then it is time to move on to fuel and spark. Most people usually want to start by adding fuel or taking away fuel to eliminate the popping. In some cases you can mask the problem of a leaky exhaust which is sucking in cold air by adding a small amount of fuel which might mitigate the problem for today but when the weather changes you are likely to have the popping return. That is why it is usually recommended to rule out the exhaust and muffler leaks first.

 

I have dealt with this issue for over 2 years now. Multiple maps on PC-V (no auto-tune). Adjustments. replaced gaskets to no avail. Everything is tight and no leaks. Right now its at the best its ever been with only occasional up-shift popping. Sometimes I can prevent it others I can not.

If its really hot out it makes it worse.

So I am going to give up the 2-1-2 and am awaiting the Dragos Dragula 2-1 with their map and am crossing my fingers it will help. I will also switch out the head gaskets back from screaming eagle to standard. I have tried both now so far but Frank recommends the standard stock gasket so we shall see if I can get it in there and that it helps.

 

I actually had the same problem recently. I have rhinehart 4" true duals a hd big air and a pcv. I changed out the rhinehart exhaust gasket with a se gasket. it seems to have fixed the problem. I would get some graphit spray and spray the gasket before you put a new one in and make sure to ride your bike and get it hot then retighten everything up...... and by the way the nut size is 9/16.

but after I redid all of this I still have a slight backfire at times. this could be im running to lean. my o2 plugs where very black when I pulled them out,

 

Going back to original head gaskets would be a good move. Although some have had good luck with the SE gaskets there are way more who have had poor luck. I think that moving to standard gaskets would be an excellent move. Just try not to put too much "arm strong" on them and be careful not to crush them. You can always tighten up a little more but once they are crushed...you are hosed. Use a torque wrench if you have one.

 

Yeah I tried the standard gaskets when I swapped out the header the first time. I just re-used them and it was worse. With the SE gaskets they slipped right in and seemed to fit better with the header.

 

I'm actually trying to help. Generic answers like a cal from George doesn't help. If you really wish for a bit of help. Answer the questions that I posted.

How about you open a Box-net account. They are free. Upload the tune to the box-net account and then post a link to that tune, here. So some of us can look at the actual tune in the bike instead of everybody guessing and NOTHING being fixed. Some of us work with TTS tunes everyday, so ya know why I am asking.