Hello, I have been looking at a 2006 XR650L and a 2007 CRF450R for my dad and I can tell that they have a noticeable weight difference, etc. I was thinking that the CRF450R might be better for the riding my dad, and I do which is trails, old gravel roads, and wide open terrain. Since the CRF is considerably lighter I would assume it would be easier to manuever through tight terrain, yet fast enough to keep up with my XR600R that I ride. Also both of the bikes have electric start which he would need due to a knee injury. So, I was wondering as to what info you could give, comparing the XR650L and the CRF450R for the types of riding that we do. If nothing else, please give your opinion on the performance of either bike, whichever one you have experience with, as well as the types of riding you do.