Hey everyone, I am looking at an 04 yz450. I have been told the bike has about 30 or 35 races on it. The guy has not yet rebuilt the motor and I was wondering if that should be a concern. I know there can be all kinds of variables that affect engine longevity but I would like to know what your experiences have been in terms of reliability, with used but well maintained yz's. The price seems great (2500) in fact it's advertised on TT. Any info would be appreciated. By the way, I am just planning on using the bike for trail riding and fun, no racing.