I'm not even sure what to call it
I have a 2013 CEO road king. I had the heads polished and milled to bring the compression brought up to 9.8-1 , put an s&s 585 cam in it, v&h monster rounds on power duals, with an HD pro tuner. This was all done in December. When I got the bike back it seem to run great. But do to the cold weather I was only doing short rides just fore fun. Mostly just to check out my new found power 20 min or so. I loaded up the bike and headed to bike week in Florida and noticed that it had kind of had a spot around 2800 -3000 were you might be cruising and it felt like it lost power,not all the time, just some of the time,also if I was talking a corner really slow in first and had the bike leaned over it would sometimes act like it wanted to die.
Called the guy who did the build and he said that since it ran good when I got it and I had let it set for almost 2 months it might be a couple of things.... Maybe and injector had gotten gummed up a little bit or maybe my first tank of gasi had gotten in Florida might be bad.try running some cleaner through it and see if it helped. Well I road for a week and it still nagged me ...
When I got back I dropped it off at his shop but to be honest it was still cold and wet here. He took it for a ride and it did fine.
I rode it some more and figure out it only did it when it was warmed up pretty good . I thought it was the tune so I took it to a different guy and had it dyno'd
And serviced but still the same thing. I decided that I wanted to try a mor mid range cam so I went to a 3rd place and had a woods 777 put in and had it dyno'd a 3rd time.
Still does it.
Anything I can look for? Any ideas ?
Thanks

 

Those CVO's are gorgeous, congrats on a great bike. Would have thought it was your tune as well.
Would find a reputable stealer or indy near by to resolve versus an open forum on the web. Not to say you won't get some interesting ideas here, but someone who knows these sleds should not have a problem dialing it in for you.
Pretty cool you got to swap cams on a whim, did you put enough miles on to be able to state a "comparison"? Not to hyjack your thread, just find it interesting.

 

I've got about 13,000 on it. Not many on the 777 though. I can tell its going to be more suited to my style of riding more in the mid rang. The 585 would get on it if you crank it up there though.
I was thinking tune to but it's similar after 3 tunes with three different guys. This new fangled crap is beyond my limited brain power. I know that as complex as this stuff is it can be something bad or some as simple as a poor electrical connection.

 

I had a stumble like you mention for a long time. It was in the tune, I have SERT on this bike. It took several tries by the dealer, he finally gave up and had a Harley factory tech to tune when he came down to train the dealer techs. My stumble was around 2200 rpms. Always did run great when hauling azz. Hope someone can figure yours out.

 

I'd say it's in your tune as well.
Time to get educated on your tuner or take it to someone who works with SE Tuners and knows what they're doing.

 

Well I think I figured it out. I'm out in Sturgis. I decided to swing by the dynojet van and check. Out the power vision an the dyno set up. He'll I'm ready to by the whole damn van if they can get my bike run mining right. So the guys are talking to me about what mods I have and what what it's doing . The techs were great. They discussed if what they had could fix my problem and if the had enough time on the dyno to really go thru it. The didn't want to sell me something and it not take care of it. This guy is kinda standing there and they act like they know him, he asks if I mind if he takes a look ? I tell him go ahead . I swear, the guy walks over kneels down and looks behind my air cleaner and says something like, " your induction management cap or induction module cap is missing so you have vacumn leak. Really ! That simple ! 10 freaking seconds! The guy tells me to hang on. Comes back in 5 min with a cap. Dynojet cleared the codes and told me to ride it. I've been riding it all day and not a single burble, miss, or lag.
I went to three dealers and got three tuned and none of them figure it out .
I got his card and he will be getting a phone call from me to do a tune after I get back.
His name is Russ Fullen from Thunder X Performance out of Bulls Gap TN

 

Wow, glad they found it, I would not go to any of the mechanics that could not figure out a vacuum leak, if they even tried to check afr they should have seen that the tune was commanding way more fuel it was still lean.

 

I love stories like this. Excellent!

 

It was really amazing. I have been fighting this for almost 6 months. The guy is just listening in the conversation and nails it. After talking to him I learned he has tons of experience. He seemed really down to earth and humble to.

 

Wow that's cool. My bike was doing the stumble thing on right hand turns but from 2500-2700 when I slowed down on compression. Stumble when rolled throttle out of turn. Wasn't lugging cause I was in 3rd gear. I was able to duplicate it at will on straight always too. I have the 640 S&S cam at 10.8-1. What's that cap look like? Any chance of posting a photo?