I rode this last Sunday (Labor Day Weekend) 186 miles getting approximately 52.7 mpg. I have built the 80 cubic inch 1340ccm motor to almost twice the stock horsepower using mostly Harley Screaming Eagle parts, cylinders, 10.5:1 pistons, rings, roller/rockers, CV 44mm carb & intake, .595 Woods cam. (approximately 95-100hrspwr) ... my BigDog friend riding his 117cu cannot believe I leave him behind, getting awesome gas mileage.