After reading wrm66's 163mph speed I thought holy crap could that be right. So I looked at a couple of bikes that had been on the dyno. All are around 140mph. In 5th gear at 6200rpm.Now this doesnt take wind resistance,hills or clutch slip into account and some other things I probably missed. The bikes seem to have the gearing to do that speed. So if your motor will pull to redline in 5th or 6th your flying and crazy!!!