After installing, I took the bike to HD and the tech did his thing. It was first time but he figured it out. He made real nervous at first because he said if he flashes the ECM it would lock it or something like that. I didn't see what he was seeing but it all worked out. If anyone decides to do this, I highly recommend going to the dealer and talk to them to make sure they are willing to do it. Apparently there are alternatives to the Digitech but I can't speak on it.