2018 Kawasaki H2 SX SE First Ride Review

The street specific Ninja H2 SX supercharger design and tuning were developed by Kawasaki Heavy Industries, Ltd. to showcase its in-house knowledge of forced induction. High efficiency and minimal heat gain, aided by the use of this aluminum airbox and good airflow through the trellis frame, eliminate the need for an intercooler and let the impeller be placed in the best position to distribute compressed air to all four cylinders. An ECU-controlled blow-off valve releases pressure in the intake chamber when the throttle is closed to prevent impeller surging and abnormal vibration. A sound hole in the intake duct lets you hear the impeller chirping as it breaks the sound barrier when you roll off the gas at speed. Or something like that. I prefer to think of it as angel wings fluttering around my helmet.