The Kawasaki Ninja H2 is a supercharged four-stroke supersport-class motorcycle in the Ninja sports bike series manufactured by Kawasaki, featuring a variable-speed centrifugal supercharger.

A quickshifter or quick shifter is a device that eliminates the need to use the clutch or throttle when shifting gears on a manual transmission. This can increase the safety and comfort of the vehicle and allow for faster gear shifting and is thus a popular performance enhancement for motorcycles.