I just purchased an 00' XR650R from a friend, and had the opportunity to run it out in the Ocotillo Wells desert this weekend. Well, immediately in the sand washes, I noticed that the bike liked to "wobble" back and forth past about 40. Now by wobble, I mean that both the front and rear tires would move from side to side in opposite directions at the same time. On the way back, I decided to swap bikes with a friend (CRF450) to see if it was the bike, or what. Well, the CRF had a very small amount of "wobble", but it corrected itself almost instantly. I then pulled alongside my friend riding my XR650, and the bike was "wobbling" so bad it was about ready to high-side and buck him off. The wierd thing is, I have never had this happen on a bike before. So, anyone know what the heck I'm talking about, or ever had it happen before? If not, I can try to elaborate further. I should mention, before I bought the bike, the front rim was replaced, so I'm thinking that maybe the front rim is out of dish, causing the wheels to be inclined to try and line up at higher speeds. I checked the rear axle thinking maybe it was not aligned, but it was. Anyway, any help would be greatly appreciated. It's no fun to own a bike that is set up to do 100+ MPH that can't break 40 safely. Thanks!!!