Glad to hear i wasn't the only one that felt a big power increase. I had done the 12 minute tune a few other times, but this was the only time it ever made a difference in any way let alone power. My believe is that it will give results like that if the bike isn't adapted well to begin with. So you aren't actually gaining more power, just restoring power that was lost somehow. In my case from swapping tunes and running without sensors on a custom tune, pulling of the seat duct, etc. So somewhere in there i ended up with a bad adaption that never really rectified itself in the time allotted.