The Kawasaki Ninja H2 is a "supercharged supersport" class motorcycle in the Ninja sportbike series, manufactured by Kawasaki Heavy Industries, featuring a variable-speed centrifugal-type supercharger. The track-only variant is called Ninja H2R and produces maximum of 310 horsepower (230 kW) and 326 horsepower (243 kW) with ram air, is the most powerful and fastest production motorcycle on the market. The H2R has 50% more power than the fastest street-legal motorcycles, while the street-legal Ninja H2 has a lower power output of 200 hp (150 kW) 210 hp (160 kW) with ram air. Its namesake is the 750 cc Kawasaki H2 Mach IV, an inline triple that was introduced by Kawasaki in 1972 to "disrupt what it saw as a sleeping motorcycle market". The street-legal Ninja H2 has rear-view mirrors in place of the track-only H2R's wings. It also has plastic body panels in place of the H2R's carbon fiber. The street-legal bike is said to make 200 horsepower (150 kW), probably with reduced supercharger boost compared to the H2R. The H2 and H2R share the supercharger (with a lower boost level on the H2) and many other components, with the exception of head gasket, cam profile and timing with ECU mapping, and exhaust system as well as the R’s clutch has two additional plates. Cycle World has recorded a 1/4 mile time of 9.62 sec. @ 152.01 mph (244.64 km/h) with a 0 to 60 mph acceleration at 2.6 seconds and a top speed of 183 mph (295 km/h). Kent Kunitsugu, editor for Sport Rider magazine, competing in a land-speed racing event in Mojave, California at the Mojave Air and Space Port airfield in the Mojave Magnum land-speed racing, took a Ninja H2 with just a few bolt-on performance parts adding over 70 horsepower to a top speed of 226.9 mph (365.2 km/h).