2014 Kawasaki KX250F, No other 250cc motocross bike in the modern four-stroke era has earned more championship titles in AMA Supercross and Motocross - Upgraded and Ready to Fight for Championships Take a look at the record books and you’ll see that no other 250 cubic centimeter motocross bike in the modern four-stroke era has earned more championship titles in AMA Supercross and Motocross than the Kawasaki KX 250F. The 2014 KX250Fs championship-winning technology includes a new Launch Control system, a plug-and-play adjustable ECU, Separate Function Fork (SFF), new motor mounts, revised suspension tuning and an upgraded transmission. Make no mistake, the KX250F is still the dominant player in the 250 cubic centimeter ranks. Ride anything else, and you’ll just be playing catch-up.