Hi, I just purchased a 2008 yz450f with extremely low hours, around 5 or 6 hrs. I was just wondering if there is anything I should be watching for as far as reliability issues. I was told that the 2008's have some cam chain problems or cam chain tensioner problems, does anyone know anything about this? Also, how would I know if my bike jumped a tooth on the timing? Would it be hard to start? Backfiring? Running rough? Also if you have any tips or advice, I would love to hear them. Thanks!