The Kawasaki Ninja H2R is a track-only motorcycle and is powered by a supercharged 998cc inline-four engine. It produces a staggering amount of power, with a claimed output of around 310 horsepower (approximately 228 kilowatts). This remarkable power output makes the Ninja H2R one of the most powerful motorcycles available.
It's always a good idea to check with the latest sources and specifications from manufacturers to find the most up-to-date information on the highest horsepower motorcycles available.