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Home / Motorcycles /Sport / 2021 Ninja 400

2021 Ninja 400


Kawasaki 2021 Ninja 400 for Sale at Moorooka Kawasaki in Moorooka, QLD | Specifications and Review Information

Sporty, Leaner Approved Riding

The Ninja 400 delivers great performance for a range of riders. The engine and chassis have superb power and are lightweight. Like the Ninja 300 that preceded it, this Ninja 400 model possesses much more than high performance. The Ninja 400 takes the winning formula that drove the success of the Ninja 250R and its successors, and amplifies it. Excitement and ease of riding for a wide range of customers - the Ninja 400 is Australia's favourite learner sports bike.

Kawasaki - 2020 Ninja 400 KRT Special Edition


The Ninja 400 399 cm3 engine delivers a balance of performance and control. The new engine offers performance at all rpm, with good power feeling. Smooth, predictable response contributes to an easy-to-control engine character.
2021 Ninja 400 -Riding-Position-


Relaxed rider triangle accommodates a wide range of rider sizes and riding situations. The handle position and slightly forward footpeg position put the rider in a position to control the bike and be comfortable.


Large 310 mm semi-floating petal front disc (effective diameter: Ø 286 mm) is gripped by a balanced actuation dual-piston caliper. The disc - the largest in its class - is the same size as the ones used on the Ninja ZX-14R.
2021 Ninja 400 -Muffler


Simplified exhaust system traces a straighter line, contributing to lower weight. Pipe wall thickness of 0.8 mm further contributes to weight savings. The exhaust design features 28.6 mm diameter headers with a connecting pipe enhancing the mid range torque. The stylish muffler provides a high grade appearance.
2021 Ninja 400 -Rear-Tyre


Radial tyres on the Ninja 400 have excellent grip, agile handling and ride comfort. The 150 mm rear tyre looks like a big bike.
Kawasaki - 2020 Ninja 400 KRT Special Edition


Stylish star-pattern 5-spoke wheels. Optimised lateral rigidity benefits handling and provides cornering stability. The wheels are a product of technology gained in racing.
2021 Ninja 400 -Styling


Head-turning looks have always been a forte of Ninja models. The new Ninja 400 boasts futuristic Ninja styling inspired by the mighty Ninja H2. The large-volume bodywork attracts attention, and gives the impression of a larger machine.
2021 Ninja 400 -Head-Lights


Slim dual LED headlamps (each featuring low and high beams, as well as a LED position lamp) are highly visible and offer significant brightness. Chin spoilers at the bottom of the front cowl were inspired by the Ninja H2 and Ninja ZX-10R.
Kawasaki - 2020 Ninja 400 KRT Special Edition


Supersport style downdraft intake provides a shorter, more direct path for intake air to enter the cylinder, improving cylinder filling efficiency and contributing to increased engine power, especially at high rpm. (The downdraft intake also contributes to chassis layout by freeing up space under the seat, facilitating a design that offers an easy reach to the ground.
Kawasaki - 2020 Ninja 400 KRT Special Edition


Assist & Slipper Clutch (Ø 139 mm >> Ø 125 mm) with less rigid operating plates offers a light lever pull. The clutch has a wider engagement range.
2021 Ninja 400 -Front-Suspension


A more rigid 41 mm telescopic fork (previously Ø37 mm) delivers better suspension action. The front wheel feels really planted, direction changes are made easily (even when the bike is fairly upright - handy when navigating traffic jams), and overall the suspension offers the plushness of a larger model.
Kawasaki - 2020 Ninja 400 KRT Special Edition


The Ninja 400 features a trellis frame similar in design to that of the Ninja H2. Kawasaki's advanced dynamic rigidity analysis was used to ensure optimum rigidity with light weight. The engine is rigid-mounted and used as a stressed member. The new frame design contributes significantly to the bike's low curb mass.
Kawasaki - 2020 Ninja 400 KRT Special Edition


The new radiator fan cover (patent pending) located behind the radiator directs hot air out to the sides away from the rider, reducing rider discomfort when stuck in heavy traffic. Redirecting the air also helps keep the tank, frame and other parts that contact the rider cooler, further increasing rider comfort.
Kawasaki - 2020 Ninja 400 KRT Special Edition


The Ninja 400 is equipped with the same instrument cluster as the Ninja 650 MY 2019, contributing to the high-grade feel of the tidy cockpit. The sophisticated instrument design features a large analogue tachometer flanked by warning lamps on one side, and a gear position indicator and multi-function LCD screen on the other.
Kawasaki - 2020 Ninja 400 KRT Special Edition


The front seat can be easily removed by pulling a cable located under the rear seat, greatly facilitating access to the battery. Under-seat storage space has two levels for a more efficient use of the space. A handy Tool Kit is located in the lower level of storage.
2021 Ninja 400 -Tailight


LED Taillight design is inspired by the NINJA ZX-10R contributes to the rear's sharp impression.



Engine Type Liquid-cooled, 4-stroke, Parallel Twin
Displacement 399 cm3
Bore x Stroke 70.0 x 51.8 mm
Compression Ratio 11.5:1
Valve System DOHC 8 valves
Fuel System Fuel Injection 32 mm x 2
Ignition Digital Advance
Starting Electric
Transmission 6-speed with Positive Neutral finder
Suspension - front 41 mm telescopic fork
Suspension - rear Bottom-Link Uni-Trak, gas-charged shock with adjustable preload
Wheel travel - f/r 120/130 mm
Ground Clearance 140 mm
Brakes - front Single semi-floating 310 mm petal disc
Brakes - rear Single balanced actuation dual-piston
Wheel Size Front Rear 3.00-17.0 4.00-17.0
Tyre Size- Front Rear 110/70R17 54H 150/60R17 66H
L x W x H 1,990 x 710 x 1,120 mm
Wheelbase 1,370 mm
Seat height 785 mm
Fuel capacity 14.0 litres
Curb Mass 168 kg
Max Power 33.4 kW @ 10,000 rpm
Max Torque 38.0 N-m @ 8,000 rpm
Colour/s Metallic Spark Black
Warranty 24 Months Unlimited Kilometres
Service Intervals 1,000, 12,000, 24,000km (refer to Owner's Handbook for more intervals)