I have owened 2 KDX's and have now went to a 2001 CR250. I was wandering who did the mods to the kdx. They are as reliable a bike you could ever want, but make sure it was done right. I am about 25 lbs heavier than you, and when I owned my KDX I thought it was more than enough in the motor department. Then I got my CR. Not even close. Every where you look someone is saying how little low end a 2001 CR250 has, it might not have alot compared to the other 250's but it has tons more than a KDX. MY riding buddy has Fredettes 2000 ISDE bike. It is night and day better than a stock KDX. The bike is fully modified, and is stone reliable. Two days ago he rode my bike for the first time, and the first thing he said was, I am getting me one of these. That means nothing. Fredette can go as fast or faster than anyone on the planet on a KDX. Rambling on HUH. I guess buy what you can afford,
and buy according to condition not image or fancy foofoo stuff on the bike. Because I can tell you always working on a bike sucks. But what ever you do dont buy the KLX300.