well, having a 97 myself, I would say that the MXZ will have a chance if the rider is lighter than you. I have put my lighter cousin on my sled and he has beaten ZRT 600's by almost 200 feet. And that was stock! He weighed about 200lbs at the time. If the MXZ is hooking up, I would not rule him out of the winner's circle...in a long race though, the 670 doesn't stand a chance.
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