Hi I'm George from SW Michigan. I go to Bonneville every year and help out with a race car and a pit vehicle of some kind is a necessity out there. The starting line is 4 miles from where we pit so a motor bike is perfect. I built one early last winter but a friend saw it and wanted it bad enough he made me an offer I couldn't refuse. This is the second one I built and I've put quite a few miles on it so far. It's a 48cc but it pulls my 230 lbs around pretty good. I had an 80cc on it but the 48 is almost as fast and doesn't vibrate so much. I just putt at about half speed anyway.