The Kawasaki KX450 is the fastest 450 4 stroke currently on the market. It produces 55 horsepower and weighs 233 pounds, giving it a power-to-weight ratio of 0.24 horsepower per pound. This makes it the most powerful and lightest 450 4 stroke on the market. The KX450 also has a number of features that make it a top performer, including a hydraulic clutch, electric start, and a Showa A-Kit suspension.
