2015 Kawasaki KXâ„¢250F KX design philosophy is simple: put mid-level to expert riders on the top step of the podium. The KX250F is 1 of the most successful machines in the 250cc class. Proven race-winner and potent track weapon in the hands of any serious rider, the KX250F is loaded with advanced technology and industry firsts that push riders to the front of the pack.