OK, after I finished riding it around slow and easy. I decided it was good to go, and ready to ride my mx track. Obviously the night I bought it, I stayed up, took apart the triple clamps, and both wheels, and greases up the wheel bearings and steering stem bearings. I still gotta do the linkage yet. But otherwise this thing is almost ready to go outa the box! Compared my my CR133, it's definitely easier to ride, and much more powerful. The throttle response is instant, like a light switch. It flies just like my 125 almost, engine braking is almost non-existant. I thought I would have to adjust more to a 4-stroke, since it's my first one, but really, I feel pretty comfortable on it already. The starting procedure is great, choke if it's cold, hot start button if it's hot. Frankly, I don't think these 250F's belong in the 125 class. It's an unfair advantage, granted it weighs about 10lbs more and isn't quite as agile as a 125, but it's darn close! I'm sold on these here 4-bangers. Any questions? So far I only got one hour of track time on it.