My buddy is starting up a new shop to work on H/D's and he purchased a new "dyno" and there is a rep with him ALL this week teaching him how to use it. The rep said that what H/D does for a down load with sert is nothing compaired to what is suppose to be done. While he is here, this Saturday he is going to do it right which will take about 5 hrs. I though the bike ran great with the sert, v-mod pipes and K&N filter topless. He said he will make it even better!!! This will all be done as a training for my buddy. Can you beat that?