When the 24 250 came out, we learned that Yamaha only made minor updates to the YZ250F engine, with most of the changes being focused on the chassis. Overall, the new bike is better, but it takes some effort to find harmony with the new chassis and engine updates. I am happy with the overall feel of the chassis, and how the bike handles. The engine however, has to be the slowest 250f engine that I've ridden in recent years. Very flat at the crack of the throttle, and up through the mid range. Still fun though! I will provide an update if I end up changing anything to this machine!