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2021 Ninja 400 ABS Kawasaki Sports Bike Review Specs Price

With a 399cc of displacement and the sophistication of the twin-cylinder engine, the 2021 Ninja 400 ABS Kawasaki Sports Bike is the most powerful in its class. Accessible power, outstanding ergonomics, and class-leading performance offer a smooth, manageable ride that will seduce both beginners and pros, setting a new standard for everyday epic sport riding. The Ninja 400 is perfect for motorcyclists who want to get into the sports riding scene, thanks to its low seat height and aggressive shape with LED lighting. The 2021 Ninja 400 is equipped with a 399cc twin-cylinder engine, assist and sleeper clutch, lightweight trail frame, Uni-Trak® rear suspension, 310mm semi-floating petal front disc brakes, twin LED headlamps, and advanced multi-instrumentation.

2021 Ninja 400 ABS Kawasaki Sports Bike

2021 Ninja 400 ABS Kawasaki Sports Bike – Features and Specs

Unique Key Features

  • Powerful engine with a smooth, predictable response.
  • Easy to use assist and sleeper clutch, including a light pull and wide engagement range.
  • The slim seat design helps enhance ground access.
  • The trail frame provides light, contributes to predictable handling, and significantly reduces weight.
  • Gigantic front brakes.

Parallel Twin Engine

Both beginners and pros will love the engine rider’s friendly demeanor, charming response, and much less torque.

The new downdraft intake tract receives intake air into the cylinder in its short, straightway, rapidly increasing cylinder filling productivity and contributing to power, particularly at high RPM. The downdraft also frees up space behind the intake set, letting it be built with less ground access.

Larger airboxes help in perfect intake performance, which in turn raises power. During acceleration, the airbox design allows the rider to hear the engine’s intake notes. An unequal height of the intake funnels gives a smooth throttle response by filtering the torque dips.

The 32 mm throttle valves are elliptical and have an angle-closed position, which aids in quick throttle response as the valves open rapidly after initial movement. Fine atomizing injectors located near the throttle valves spray fuel directly on the valves, improve combustion efficiency and allow more linear throttle response. At all engine speeds, 7 mm of intake and 23.5 mm of exhaust valves increase efficiency. Forged camshafts, usually available only on large displacement machines, help save weight.

2021 Ninja 400 ABS Kawasaki Sports Bike

Engine Continued

The mechanical balance shaft reduces engine vibration for a smooth ride. The oil pan’s design allows the exhaust system to run in a more straight line, resulting in weight savings. Larger diameter header pipes outperform the range. Cooling system management reduces the weight and quantity of external coolant pipes.

When riding in heavy traffic, the radiator fan cover guides the warm air around and away from the rider for better comfort. It also holds the tank, frame, and other parts that come in contact with the rider cooler, which increases the convenience of the rider.

Lightweight Trellis Frame

The design of the trail frame is comparable to that of the Kawasaki Ninja H2. The structure was designed using Kawasaki’s latest dynamic stiffness analysis to accomplish maximum stiffness with negligible weight, which ominously increases the overall low curb mass of the motorcycle.

An attractive supersport-style chassis combined perfectly with a short wheelbase and extended swing arm with its sharp steering angle, creating light, quick handling.


The square tube swing arm offers stiffness without excessive gusting, ensuing in ultimate weight savings. Overall, ride quality is better than the suspension linkage ratios and shock settings after the Uni-Trak (KP). The 41mm fork offers rigidity and smooth suspension movement, resulting in more front-wheel engagement.

2021 Ninja 400 ABS Kawasaki Sports Bike


A balanced activation dual-piston caliper grips the large 310 mm semi-floating petal front disc. The new front brake is the largest in the class, with the same disc size as the Ninja ZX-14R. For a more positive feeling, a stiff front brake master cylinder helps reduce idle strokes.

A 220mm rear wing disc is closed with a large piston by a rear dual-piston caliper. The ABS model is equipped with Nissin’s state-of-the-art small ABS control unit, which helps to apply the brakes in certain situations.


The 2021 Ninja 400 ABS Kawasaki Sports Bike’s extensive bodywork helps it look more significant than the entry-level machine and complies with the Ninja ZX-6R / 10R. The sharp front cowls of the Ninja H2 and Ninja ZX-10R combine images of Kawasaki’s supersport flagship the Ninja H2 and Ninja ZX-10R with chin strain.

Thin LED headlights give the car a more aggressive look, are more noticeable to other drivers, and provide more brightness than conventional bulbs. The Ninja 400’s tail cowl has the same triple peak design as the Ninja H2, emphasizing the Ninja 400’s heritage. The beautiful look of the Ninja 400 is complemented by an LED taillight that looks similar to the Ninja ZX-10R.


Riders of all sizes and riding scenarios can take advantage of the comfortable position. The 2021 Ninja 400 ABS Kawasaki Sports Bike’s high handlebar position and slightly forward footpegs keep the rider relaxed, unlike competitors with more radical ergonomics.

Extensive volume bodywork provides excellent air protection and provides clean airflow around the rider, which improves comfort. This design also helps eliminate engine heat by firing side holes. The seat cushioning is thicker and uses less rebound urethane for extra comfort, and the rider’s feet are narrow enough to reach the ground quickly.

2021 Ninja 400 ABS Kawasaki Sports Bike – Price

The new 2021 Ninja 400 ABS Kawasaki Sports Motorcycle is available for $5,399 only.

2021 Ninja 400 ABS Kawasaki Sports Bike

2021 Ninja 400 ABS Kawasaki Sports Bike – Technical Specifications


Type 4-Stroke, DOHC, Liquid-Cooled, 4 Valve Cylinder Head, Parallel Twin
Displacement 399 cc
Bore & Stroke 70 mm x 51.8 mm
Maximum Torque 28.0 lb-ft @ 8,000 rpm
Compression Ratio 11.5:1
Fuel System DFI containing 32mm Throttle Bodies (2)
Ignition TCBI contains Digital Advance
Transmission 6-Speed containing Positive Neutral Finder
Final Drive Sealed Chain


Rake/Trail 24.7° / 3.6 in.
Front Wheel Travel 4.7 in.
Rear Wheel Travel 5.1 in.
Front Tire Size 110/70-17
Rear Tire Size 150/60-17
Wheelbase 53.9 in.
Fuel Tank Capacity 3.7 gal.
Seat Height 30.9 in.
Curb Weight 362 / 366 (ABS) lb.

Suspension and Brakes

Front Suspension 41 mm of Hydraulic Telescopic Fork
Rear Suspension Bottom Link Uni-Trak, including Adjustable Preload
Front Brake Type Single 310 mm Petal Disc including 2-Piston Balanced Actuation Caliper
Rear Brake Type Single 220 mm of Petal Disc with 2-Piston Caliper


Warranty 12 months
Kawasaki Protection Plus™ 12, 24, 36, or 48 months

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