I'm new to bikes, and I'm looking for a little guidance. I'm an "A" class mx rider on quads, but I'm looking to switch to bikes. I'm looking at used Kawi kx250f's, and I had a couple bikes in mind, one 07 and one 09. From what I understand, almost the entire bike was new for 2009. Would someone with very little bike experience benefit from any of those changes? The extra cash isn't really a problem, but only if I will get results that I can notice. Thanks for any help.