My buddy has a stage 1 on a 14. Tank for tank, our latest run I got around 10 miles less out of it.

That's highway riding, 65-80, with burst up to 95 on occasion.

 

Mine was not affected at all from what I can tell. I never checked it before but I have checked it twice since. 42 on a tank of cruising and 34 on a tank riding it hard.

 

Sweet, that's not bad. Looking at your numbers I'm thinking with done headwork it'll really bring out some ponies. But have to wait till warranty runs out!