I have 2 IDENTICAL 2004 BLACK viper er's. I get a LOT BETTER fuel mileage than my wife does... She drives it like a FARM TRACTOR and we can go on the SAME EXACT 50 mile trip and I will have 3 miles MORE than her?????? It is 3 miles worth of SPINNING the track when I come off a little 1 foot hill or crossing a road, I LIKE throwing the bump on the street!!!! I have 3 more miles than her and STILL HAVE MORE FUEL in my tank????????? SHE HAS NEVER EVER squeezed the throttle to the handlebar,,, and I DO IT ALL THE TIME?????? I am at LEAST A FOOT taller and MORE THAN 100 pounds heavier!!!! Same bibs, jackets and helmets,,, same stickers on the side of the sled,,,, so you see,,, DRIVING LIKE AN IDIOT actually gives you BETTER GAS MILEAGE!!!!!