I rode my 2004 KX250 for the first time yesterday! Here's my first impression.
First, I owned an 2003 and loved it but I didn't like the soft seat and I was sitting too low, plus the power was OK but not that strong.
Kawasaki fixed the little things, the seat it higher and harder and comes with a nice gripper cover. The new front brake routing and the new fork protectors look great. The linkage and the swingarm are also new.
Now, on the track!! The thing PULL HARD!!!! REAL HARD! The jetting is very crisp and the throttle response is just amazing. The bottom and mid are very good, a LOT better than last year. The only thing is it's still typical kawasaki and the top end is very limited. But with an idiot proof powerband like that, just shift it and live happy forever. The bike is very easy to ride, there is no sudden rush of power, it's constant strong delivery from the very bottom to the top. I was very happy with the motor.
The handling is even better than last year, I'm 6'1" and last year small seat was not cool for me. It was hard to get back up after a corner. GONE!! The new seat is awesome and the riding position is better. Felt great right away. The new rear link makes the bike corner even better. I struggle with the forks a bit (but remember they are new, need break in time) but found a better setting by the end of the night.
Bottom line, I'm very happy with the new bike, they basically fixed the things that I didn't like about my 03. Good job Kawasaki.