Top Speed of Kawasaki Ninja ZX-6R i Motorcycle Contributor By JamesP on October 17, 2023 Category(s)Bikes and MotorcyclesTopic(s)Kawasaki Ninja ZX-6R iHeavy Bikes 257 km/hTop speed of Kawasaki Ninja ZX-6R i motorcycle is 257 km/h (160 mph).