2012 Kawasaki KX250F, RACE KX250F WITH FUEL INJECTIONS - Kawasaki Innovation Continues with Dual Injectors No other bike in its class has spent more time on the AMA Supercross podium than the Kawasaki KX250F. The race-proven technology of the quarter-liter motocross leader returns for 2012, but with added enhancements that give the KX250F even more usable power, increased durability, and the best-handling chassis yet.