I have a 96 xr 600 and my friend has a '00 wr400. In the open stuff I'm faster than he is, but not when it get's tight. Anyways, he asked if I could go faster on a more powerful bike, or if i was holding back. I said I could go faster, and that I would like to try an xr650. But he said his wr would be faster than an xr650 in a straight line drag. I said I'd guess the 650 was faster, but I don't know. Does anybody actually know which is faster? Has anybody tried? Also, would the 650 be more of a handfull on trails than my xr6? How does it compare in terms of starting, cornering, throttle response etc? ps. I know the rider makes more difference than the bike, that's why I can't keep up on a tight trail, I was just wondering out of curiosity which was faster.