Yesterday I went riding my CR144 E85 Eric Gorr. There was a KX250F 2011 there. On the track we were pretty close, following eachother. I haven't ridden since March though, and so if I practiced I'd clearly be faster. Anyhoo We got chatting, and I said I'm pretty sure this bike will beat that in an all out drag race, because it's not a 125 any more. He said, let's go race, I was cool with that. We went up to a road and went at it twice. Both times, we were dead even from start until I topped out, and let off. His bike clearly still had more to go as he started pulling at the end. So my conclusion, and even my friend who was with me that is a 4 stroke fighter through and through, that it is more fair than many think with 250 2 stroke vs 250 4 stroke. Being that 4 strokes have smoother power, the 144cc just isn't any faster than the 250F. It is just as fast, but the fact that a 250F has smoother power, If I was racing, I would want a 250 2 stroke against a 250F, not just the 144. I left pretty surpised, but also now understand why I keep seeing videos with 250 vs 250 being very good races. That bike was still stock as well, although pretty loud, so may be opened up. Anyways, Just my person opinion...