I'm looking at trading my 07 KX250 for or possibly buying a 2010 YZ450F. Any body have any problems with this year or have any advice on what too look at on the bike. I'm really just looking for anyone who knows if these bikes were lemons or has any flaws to them. Help would be much appreciated Thanks!! ALSO, would I be better off selling my bike for $2400 and paying extra cash for a 2013-2014 450F? Is the technology between 2010 and 2014 that much more advanced to pay the extra cash? Thanks!