We saved the best for the last, no top 5 feels properly complete without a Kawasaki in it. Now, 2021 KX65 is the most compact bike in the Kawasaki KX lineup, built to serve as the machine of choice for aspiring motocross racers driven to follow in Kawasaki’s championship footsteps. Its liquid-cooled, two-stroke 65cc engine and light weight chassis delivers strong controllable power and exceptional handling.Cobra, a classic American name defining the bold American heart that craves adrenaline rush. This aerospace grade light weight, properly balanced machine is all about sustenance, Cobra’s 2020 CX65 engine receives improved port shapes and timing. More power everywhere plus a flattened torque curve will not only get holeshots and reduce lap times.