Some had crank issues, if it had bottom end replaced, then no worries. Get a good clutch kit and tune for your riding area, Doo updates were available for this stock clutch set up, but aftermarket is the way to go (search on here, lots of info on these clutches). You can do aftermarket head to get compression up to what the 2006 had. Stock powderlite track was not overly desired for soft deep snow conditions, if it came with powdermax track then no worries there either. put a can on it, and ride it.
