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2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle Review Specs Price

The 2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle is a lightweight yet robust sport bike with a built-in, track-inspired design. Unlike other light sports bike rivals, the 2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle has more power thanks to its excellent displacement engine. Fresh, angular bodywork, including LED headlights for the latest styling; And Kawasaki Racing Team DNA, the only manufacturer to have won five consecutive FIM Superbike World Championships. Every ride is so exciting that only a ninja sport bike can do it. With 399cc displacement and twin-cylinder engine sophistication, the Ninja 400 ABS KRT is the most powerful in its class.

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle – Features and Specs

Unique Key Features

  • The engine is strong, but the answer is smooth and predictable.
  • Easy to use assist and sleeper clutch with a light pull and wide engagement range.
  • The slim seat design helps improve ground access.
  • The trail frame provides light, contributes to predictable handling, and has significant weight savings.
  • Most oversized front brakes for class on class.

Parallel Twin Engine

Both new and experienced riders will love the engine rider’s friendly demeanor, smooth response, and much less torque. The downdraft intake track takes intake air into the cylinder in a short, straightway, increasing cylinder filling efficiency and contributing to power, especially at high RPM. The down draft also frees up space behind the intake set, allowing it to be built with less ground access.

Larger airboxes help with intake performance, which in turn increases power. During acceleration, the airbox design lets the rider hear the engine’s intake notes more clearly. The unequal height of the intake funnels helps to smooth the throttle response by filtering the torque dips.

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle

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, 7mm intake and 23.5mm exhaust valves increase efficiency. Fake camshafts, usually only available on large displacement machines, help save weight. An all-new oil jets cool the underside of the piston, giving the piston a lighter design.

The open deck design of the aluminum die-cast cylinder allows good heat dissipation and reduces engine weight—the sleeveless cylinder in which the mounted bore is used.

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 rider’s convenience.

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle


The Assist and Sleeper Clutch (KP) is small, and its working plates help reduce the lever draw, making the lever feel very light. It’s easy to control with a wide range of engagements.

The clutch is pressed together during acceleration (Assist function) using the rotating forces of the clutch hub and pressure plate, allowing the use of low and light clutch springs for a soft feeling on the lever. The sleeper function allows some clutches to slip during high back-torque conditions, such as when a low gear is selected while shifting down, rear wheel hops, and reduced stops due to engine lock-up. It helps Close gear ratio helps in smooth shifting.

Lightweight Trellis Frame

The design of the trailer frame is comparable to that of the Ninja H2. The structure was designed using Kawasaki’s state-of-the-art dynamic stiffness analysis to achieve maximum stiffness with minimal weight, which significantly increases the overall low curb mass of the bike.

The supersport-style chassis combines a short wheelbase and extended swing arm with a sharp steering angle, creating light, quick handling.


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


A balanced activation dual-piston caliper grips the large 310 mm semi-floating petal front disc. The brand-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 Ninja 400’s significant bodywork helps it look more extensive 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 bike 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 Ninja 400’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.

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle

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. Regarding sport riding, supersport-style aluminum foot packs provide a natural feel.

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle – Technical Specifications


Type 399cc, liquid-cooled, 4-stroke, DOHC 8-valve parallel twin
Bore x Stroke 70.0 x 51.8 mm
Compression Ratio 11.5:1
Fuel System Fuel injection: ø32 mm x 2
Ignition Digital
Starting Electric
Lubrication Forced lubrication, wet sump
Transmission 6-speed, return
Clutch Wet multi-disc, manual
Final Drive Chain


Frame Trellis, high-tensile steel
Front Suspension / Wheel Travel 41mm telescopic fork / 120 mm (4.7 inches)
Rear Suspension / Wheel Travel Bottom-link Uni Trak, gas-charged shock including adjustable spring preload / 130 mm (5.1 in)
Rake / Trail 24.7-degree / 92mm
Steering Angle (L/R) 35-degree / 35-degree
Front Tire 110/70R17M/C 54H
Rear Tire 150/60R17M/C 66H
Front Brake Single semi-floating 310mm petal disc with balanced actuation dual-piston caliper
Rear Brake ø220 mm petal disc with dual-piston caliper

2021 Kawasaki Ninja 400 ABS KRT Sports Motorcycle


L x W x H 1,990mm x 710mm x 1,120mm (78.3 in x 28 in x 44.1 in)
Wheelbase 1,370 mm (53.9 in)
Road Clearance 140 mm (5.5 in)
Seat Height 785 mm (30.9 in)
Curb Mass 166 kg (366 lb)
Fuel Capacity 14 liters
Instrumentation Analog-style tachometer + warning lights and LCD screen including gear position indicator, dual trip meters, digital speedometer, odometer, remaining range, current and average fuel consumption, external temperature, coolant temperature, clock, and Economical Riding Indicator


Warranty 12 months
Kawasaki Protection Plus 12 / 24 / 36 / 48 months

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