The Kawasaki KLX 450R is an off-road motorcycle made by Kawasaki Heavy Industries of Japan. Please enjoy Mainland's look at the 2014 Kawasaki KFX450R sport quad. Enjoy the videos and music you love, upload original content, and share it all with friends, family. Take the short cut to the circuit with the all-new Kawasaki KFX®450R ATV. Built around the proven KFX450F motocross engine, the powerplant inside the KFX 450R has premium digital fuel injection for constant,. KX450F power in a chassis that's ready to handle anything on the track or trail.