I have stock gen 1 and my average is 25mpg, perhaps 2-4mpg to low, but for me quite acceptable.
Yes not as much energy in alcohol and it's even worse when the gas part is in winter mode. It's a bit more but I run Boat/Classic car alcohol free gas in mine mainly cause I have to park it for weeks at a time when I go out of state and it is more stable.Something wrong, I use to get 52mpg riding two persons before they started screwing with our gas ethanol content. Now it's around 48.
Going from a 50 to a 55 series tire is like taking away roughly 2 teeth on the rear sprocket.
Which lowers the revs at any given speed right?
Yes sir.