When I bought my '14 Street Glide, I upgraded the pipes, intake and put a Cobra Fi 2000 tuner on it. Did the appropriate break in mileage. Noticed right away that you could feel the tuner remapping as you changed terrain elevation, just a slight hesitation every so often. If I had the cruise on and reached over to goose it to get around somebody, there was a noticeable hesitation as it caught up to itself. I worked with the dealership and tech support at Cobra and never did get it solved. I finally had HD swap it out for a Screamin Eagle unit and have had no problems whatsoever since. I have a friend that used to drag race internationally, he said the Cobra's were famous for this kind of thing. Anybody else experience this?