The Kawasaki GPZ - Ninja in its larger incarnations - was a revolutionary sport bike range manufactured by Kawasaki from 1982 to 2003. The model went through many incarnations - for example a bikini fairing was added to the 750, the power was increased and Mikuni 34mm carbs gave it better airflow making it the fastest factory version out there. In 1983, the GPZ engine was modified further, with various things like a new frame, new brakes and wheels and Uni-Trak suspension.