hmm...Have a 98 YZ400 purchased about 6 months ago. I think I have a problem with my wheel offsets, especially the rear. Having problems jumping and even balancing when coasting. It feels like the rear end wants to kick a bit on launch and roll over on it's right. The front wheel is as straight as can be, but off center to the right a bit. Rear is off center to the left over an inch and I noticed the sidewall knobbies hit the chain. The bike had Excel rims on it from the previous owner. Should the rear wheel be offset to the left allowing for brake rotor clearance? Doesn't sound right but I can't think what else it could be. Could the wrong spoke set have been laced up? Got the rear wheel off, tire off, pulled a spoke out of each side, they are the same length as far as I can tell. Any ideas? Maybe I'm way off?