Not mine. I gained probably 10 HP with my mods and my milage went up about 3 MPG. It should not go down because the bike is getting more power out of the mix, so if you ride the same you should get BETTER milage. Problem is, once people get better power they tend to use it of course.......why else do it? But if you drive it the same as you did before you should see better numbers. When i ride like i did before the mods i get better milage.
