The 2021 Kawasaki Ninja 650 base model is powered by a 649cc liquid-cooled parallel-twin engine that delivers 67 horsepower and 48.5 lb-ft of torque through a 6-speed transmission. Built on a lightweight steel trellis frame, the sportbike features a 41mm telescopic front fork, an adjustable horizontal back-link rear suspension, and dual 300mm front petal disc brakes. It offers a rider-friendly 31.1-inch seat height , a 55.5-inch wheelbase, a 4.0-gallon fuel capacity, and a total curb weight of 419 pounds .