2010 KAWASAKI KX85, Tomorrow's champions start here. For the growing, young rider ready to step it up to the next level or slightly older beginners looking to start racing, the Kawasaki KX 85 is a youth racers dream. Powered by a liquid-cooled, two-stroke, single-cylinder 84 cubic centimeter engine that generates race-winning power, the KX85 is packed with high-tech features such as an electrofusion-coated cylinder with a narrow squish band and large-volume combustion chamber to boost top-end power.