Haha you guys crack me up. Anyway I appreciate all of the advice, all of your input if going to effect my decision along with what I feel and see with the bike. OK so here's the thing, the deal is I have a completely rebuilt 2007 kx250. I'm asking all of you....would you trade him your 2007 kx250 and give him 300 bucks for a 2010 yz450f?? Would it be worth it to all of you??? Yes or NO!!!! Thanks!!!! Not if he offered me a masserati to go with it. KX250s weren't the best handling bikes either thoguh. Atleast not the last gen made, you might evne find improvement on teh YZF. Up to you mate. I wouldn't do it no.