The 2023 Kawasaki Ninja 400 base model is a lightweight sportbike featuring a 399 cc liquid-cooled parallel-twin engine that produces 44.8 horsepower and 27 lb-ft of torque, mated to a 6-speed transmission with an assist and slipper clutch. Built on a high-tensile steel trellis frame, it features a highly accessible 30.9-inch seat height, a 3.7-gallon fuel capacity, and a lightweight curb weight of 366 lbs. Stopping power is delivered through a single 310 mm front petal disc and a 193 mm rear petal disc, while Dunlop Sportmax GPR-300 tires on 17-inch wheels connect the bike to the road.