I have a 2013 wide glide with van & hines big radius, se air filter and Sepro tuner. I had really bad decel pop so I scheduled to bring it in for some dyno time. I have to give atlantic county harley in n.j. Two thumbs up for the job they did, no more decel pop. After the dyno time the tech took the bike on the road at least 8-10 times fine tuning it. I believe it comes down to how much time a tech is willing to put into a bike to get it on the money, this is just my opinion.