2023 Kawasaki Ninja 400 Guide • Total Motorcycle (2024)

2023 Kawasaki Ninja 400 Guide • Total Motorcycle (1)

2023 Kawasaki Ninja 400: NON-ABS FOR PURE SPORTINESS.

Introducing the 2023 Kawasaki Ninja 400…

The 2023 Ninja400 sport motorcycle offers the largest displacement in its category at 399cc with the sophistication of a twin-cylinder engine. Approachable power, superb ergonomics and class-leading performance offer a smooth, manageable ride that’s ideal for new riders while also alluring experienced riders, setting a new standard for everyday sport riding. A low seat height and aggressive styling with LED headlights make the Ninja 400 the ideal choice for riders looking to enter the sport-riding scene. The 2023 Ninja 400 features a compact 399cc twin-cylinder engine, Assist & Slipper Clutch, lightweight trellis frame, Uni-Trak rear suspension, 310mm semi-floating petal front disc brake, twin LED headlights, and high-grade multifunction dash instrumentation. For 2023, the Ninja 400 and the Ninja 400 ABS are available in Metallic Carbon Gray / Metallic Matte Carbon Gray, Pearl Blizzard White / Metallic Carbon Gray, and Metallic Magnetic Dark Gray / Metallic Matte Twilight Blue.

The Ninja 400 is a street-born, track-inspired lightweight sportbike. Unlike other lightweight sportbike competitors, the Ninja 400 has more power with its larger displacement engine; fresh, angular bodywork with LED headlights for the most modern styling; and has the Kawasaki Racing Team DNA from the only manufacturer that currently holds six consecutive FIM Superbike World Championships (2015-2020). Every ride thrills as only a true Ninja sport bike can.

Clad in sharp Ninja styling, the Ninja 400 delivers greater performance than its predecessor care of all-new engine and chassis that are more powerful and significantly lighter. But like the Ninja 300 that preceded it, this Ninja model possesses much more than high performance. Not only does the Ninja 400 offer stunning, high-quality looks, its stronger engine performance, light, predictable handling and relaxed, sporty riding position make it both fun and easy to ride.

2023 Kawasaki Ninja 400 Totalmotorcycle.com Key Features


Kawasaki welcomes the return of several sport, retro sport, naked, cruiser, adventure touring, and dual-sport models to its street motorcycle lineup. These 2023 model year motorcycles are set to arrive in Kawasaki dealerships during the summer months so that riders can continue to “Let the good times roll.”

Kawasaki covers the 400cc class bases in 2023

Two of Kawasaki’s stand-out A2 licence compliant machines of recent years make a welcome return for the 2023 model year line up.

As the naked style category continues to expand in size and popularity, the Z400 will ably fulfil the need for a Z model for A2 licence holders fashioned in the same style as its Sugomi styled Z siblings. 2022 has witnessed celebrations highlighting 50 years of the famous Z range providing a springboard for the re-introduction of the Euro5 compliant Z400 complete with its 399 cm3 parallel twin water-cooled engine delivering 33.4 kW (45PS) and 37 N.m (3.8kg-m) of torque at 8,000 rpm.

Complete with an assist and slipper clutch and a trellis frame mirroring the chassis of the range-leading Z H2, the Z400 provides a big bike personality in a manageable package for those making their way up the capacity ladder or those who feel the 400cc class is their ideal destination.

A seat height of 785 mm contributes towards admirable manoeuvrability while Kawasaki’s unique ERGO-fit optional seat enhances riding comfort for taller riders, making the Z400 the most logical choice in class.

Track focused fans also have good reason to rejoice in 2023 as the range partner for the Z model will be the highly popular Ninja 400. The base machine for race and Championship winning machinery in the highly competitive WorldSSP300 Championship, the handling and performance credentials of the Ninja need no further amplification. The chosen mount of current champion, Adrian Huertas, the new 2023 Ninja 400 shares its A2 licence compliance with the Z400 along with a tubular trellis chassis and powerful 286mm front disc brake coupled with an equally effective 193mm rear rotor.

Ninja style never goes out of fashion and the Ninja 400 revels in its family resemblance to the mighty Ninja ZX-10R, a machine that has achieved unparalleled levels of WorldSBK Championship success. And like its Ninja big brother, the 400-class machine also features an assist and slipper clutch facilitating smooth gear down changes and a 20% lighter lever pull at the handlebar.

Anticipation for the re-introduction of not one but two A2 licence compliant 400cc class machines in Euro5 specification will build towards their addition to a comprehensive range for the 2023 model year creating tough yet enjoyable choice for prospective owners. Naked style or Ninja style, Kawasaki has the 2023 mid-capacity class bases covered.

2023 Kawasaki Ninja 400 Totalmotorcycle.com Features and Benefits

Twin LED Headlamps
In addition to contributing to the Ninja 400’s sharper looks, slim LED headlamps (each featuring low and high beams, as well as a LED position lamp) are highly visible and offer significantly increased brightness.

Powerful, Rider-Friendly Parallel Twin
The Ninja 400’s 399 cm3 engine delivers a balance of performance and controllability. The engine offers increased performance at all rpm compared to its predecessor, with good power feeling. Smooth, predictable response contributes to an easy-to-control engine character. Thanks to its efficient design, the compact, lightweight engine has a size on par with 250cc engines.

High-Grade co*ckpit
The Ninja 400 is equipped with a sophisticated co*ckpit, featuring a large analogue tachometer flanked by warning lamps on one side, and a gear position indicator and multi-function LCD screen on the other.

Largest Brake Disc in Class
Measuring ø310 mm (the same disc size used on the Ninja ZZR1400), the Ninja 400’s semifloating front disc offers sure stopping power. A rigid new front brake master cylinder helps eliminate ineffective (idle) stroke, contributing to controllability, while carefully selected brake hose dimensions and material contribute to brake touch. Featuring the latest ABS unit from Nissin, the most compact and lightweight available.

Relaxed, Sporty Riding Position
Relaxed rider triangle accommodates a wide range of rider sizes and riding situations. Compared to some other models (whose somewhat extreme riding position compromises comfort), the elevated handle position and slightly foot-forward footpeg position put the rider in a position to control the bike while also offering rider comfort.

Easy Reach to the Ground
While seat height is 785 mm, the slim design of both the seat and the rear of the engine gives riders an unobstructed line for their feet to reach the ground.

Sharp Ninja Styling
Head-turning looks have always been a forte of Ninja models, regardless of displacement. The new Ninja 400 boasts futuristic new Ninja styling inspired by the mighty Ninja H2. The largevolume bodywork attracts attention, and gives the impression of a larger machine. This impression is reinforced by the high-class design and superb fit and finish, which are comparable to bikes from a larger-displacement class.

Lightweight Trellis Frame
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 rigidmounted and used as a stressed member. The frame design contributes significantly to the bike’s low curb mass.


ERGO-FIT is an interface system that allows a wide range of riders to feel at one with their machine. Genuine Kawasaki Accessories may need to be purchased for certain Ergo Fit adjustments.

Based on racing technology, the Assist & Slipper Clutch acts as both a back-torque limiter and a self-servo mechanism that enables a lighter clutch lever pull.

The Economical Riding Indicator is a mark appearing on the instrument panel to indicate favourable fuel consumption, encouraging fuel efficient riding.

Parallel Twin Engine

The engine has a rider-friendly character, smooth response and abundant low-end torque to please both new and experienced riders. • Downdraft intake tract provides a short, direct path for intake air to enter the cylinder, improving cylinderfilling efficiency and contributing to power, especially
at high rpm. The downdraft intake also helps eliminate space under the seat so that it could be designed to provide an easier reach to the ground.

• Large airbox contributes to intake efficiency for more power. The airbox design helps the rider more clearly hear the engine’s intake note during acceleration.
• Unequal height of the intake funnels help smooth throttle response by tuning out torque valleys.
• The 32mm throttle valves are oval shaped so that their closed position is at an angle, which contributes to quick throttle response as the valves open quickly from initial valve rotation.
• Fine-atomizing injectors positioned close to the throttle valves allows them to spray fuel directly onto the valves, which contributes to combustion
efficiency and linear throttle response.
• 27.7mm intake and 23.5mm exhaust valves contribute to performance at all engine speeds.
• Forged camshafts, usually found only on largerdisplacement machines, contribute to weight reduction.
• Oil jets cool the underside of the pistons, enabling a lighter piston design.
• Aluminum die-cast cylinder has an open deck design for excellent heat dissipation and reduced engine weight. Cylinders are sleeveless with plated bores.
• The cylinder is tilted forward 20 degrees to help reduce overall engine height.
• Lightweight flywheel lets the engine rev quickly for sharp response and direct power feeling.
• Machined balancer shaft helps offset engine vibration for a more comfortable ride.
• Oil pan design allows the exhaust system to trace a straighter line, which contributes to weight savings.
• Large-diameter header pipes contribute to performance throughout the rev range.
• Cooling system layout minimizes weight and external coolant pipes.
• Radiator fan cover directs hot air out to the sides and away from the rider for increased comfort when riding in heavy traffic. It also helps keep the tank, frame and other parts that the rider contacts cooler, further increasing comfort.

• The assist and slipper clutch(KP) is compact, and it’s operating plates help reduce lever pull for an extremely light feel at the lever. A wide engagement range helps make it easy to control.
• Using the rotational forces of the clutch hub and pressure plate, the clutch is forced together during acceleration (assist function) so that fewer and
lighter clutch springs can be used for a lighter feel at the lever. During high back torque, such as when too low of gear is selected during downshifting, the slipper function allows some clutch slippage to help prevent rear wheel hop and stalling due to engine lock-up.
• Close gear ratios facilitate smooth shifting.

Lightweight Trellis Frame
• Trellis frame is similar in design to that of the Ninja H2™. Kawasaki’s advanced dynamic rigidity analysis was used to ensure optimum rigidity with minimal weight, so the frame significantly contributes to the bikes low overall curb mass.
• Supersport-style chassis design has a short wheelbase and long swingarm complemented by a steep steering angle that provides light, nimble handling.

• Square-tube swingarm construction provides rigidity without unnecessary gusseting, which contributes to weight savings.
• Uni-Trak(KP) rear suspension linkage ratios and shock settings enhance the ride feel.
• 41mm fork provides rigidity and smooth suspension action so the front wheel has a better planted feel.

• Large 310mm semi-floating petal front disc is gripped by a balanced actuation dual-piston caliper. The front brake is the largest in the class and disc size is the same as the ones on the Ninja ZX™-14R.
• Rigid front brake master cylinder helps eliminate idle stroke for a more positive feel.
• Rear dual-piston caliper with large pistons clamps a 220mm rear petal disc.

• Stylish star-pattern 5-spoke wheels are similar to those of the Ninja 650, contribute weight savings, and their optimized lateral rigidity benefits handling by adding to cornering performance.
• Radial tires offer light weight, excellent grip and contribute to both agile handling and riding comfort.


• Large-volume bodywork helps make the Ninja 400 appear bigger than an entry-class machine and more in line with the Ninja ZX™-6R/10R.
• Sharp front cowl with chin spoilers invoke images of the Kawasaki supersport flagship Ninja H2™ and Ninja ZX10R.
• Slim LED headlights enhance the aggressive look, are highly visible to other motorists and provide increased brightness over conventional bulbs.
• Tail cowl features the same triple-peak design of the Ninja H2, further reinforcing the Ninja 400’s bloodline. An LED tail light similar in design to that of the Ninja ZX10R finishes off the Ninja 400’s sharp impression.


• Relaxed riding position accommodates a wide range of rider sizes and riding situations. Unlike some competitors with more extreme ergonomics, the Ninja 400’s elevated handlegrip position and slightly forward footpegs put the rider in a comfortable position.
• The large-volume bodywork provides great wind protection and promotes clean airflow around the rider, adding to comfort. The design also helps dissipate engine heat out the side openings of the fairing.
• The seat cushioning is thick, uses low-rebound urethane for added comfort, and is relatively narrow, so that it is easier for rider’s feet to reach the ground.
• Supersport-style aluminium footpegs provide direct feel when sport riding. High Grade Instrumentation • Equipped with the same instrument panel as the Ninja 650 with a large analog tachometer flanked by warning lamps on the left and gear-position indicator and multifunction LCD screen on the right.
• LCD screen has a negative display for a sporty, modern appearance.
• Gear position indicator helps with shifting precision and confidence.
• Other display functions include odometer, dual trip meters, remaining fuel range, current and average fuel consumption, coolant temperature, clock and Economical Riding Indicator.
• The Economical Riding Indicator appears to indicate favorable fuel consumption to help riders maximize fuel mileage.

2023 Kawasaki Ninja 400 – Totalmotorcycle.comUSA Specifications/Technical Details
US MSRP Price: $5699 – $5899 USD
Canada MSRP Price: $ CDN
Europe/UK MSRP Price: £6099 – 6299 GBP (On The Road inc 20% Vat)

Engine Type 4-Stroke, Liquid-Cooled, DOHC, 4 Valve Cylinder Head, Parallel Twin
Displacement 399 cc
Bore & Stroke 70.0 x 51.8 mm
Maximum Torque 28.0 lb-ft @ 8,000 rpm
Compression Ratio 11.5:1
Fuel System DFI w/ 32 mm Throttle Bodies (2)
Ignition TCBI with Digital Advance
Transmission 6-Speed with 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.
Front Suspension 41mm Hydraulic Telescopic Fork
Rear Suspension Bottom Link Uni-Trak with Adjustable Preload
Front Brake Type Single 310mm Petal Disc with 2-Piston Balanced Actuation Caliper
Rear Brake Type Single 220mm Petal Disc with 2-Piston Caliper
Fuel Tank Capacity 3.7 gal.
Seat Height 30.9 in.
Curb Weight= 362 lb.
Warranty 12 months
Kawasaki Protection Plus™ 12, 24, 36 or 48 months
(Specifications subject to change without notice.)
= = Includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90% of capacity) and tool kit (if supplied).
When equipped, 50-state models with evaporative emissions equipment adds approximately 2.2 pounds.
(KP) = See Kaw-Pedia section for more details.
* = Changes from previous model year.
** = Also available as a 50-state model with the last character ending in “L

2023 Kawasaki Ninja 400 – Totalmotorcycle.com Canadian Specifications/Technical Details


2023 Kawasaki Ninja 400 – Totalmotorcycle.comEuropean Specifications/Technical Details

Engine typeLiquid-cooled, 4-stroke Parallel Twin
Displacement399 cm³
Bore x stroke70 x 51.8 mm
Compression ratio11.5:1
Valve systemDOHC, 8 valves
Fuel systemFuel injection: Ø 32 mm x 2
Starting SystemElectric
LubricationForced lubrication, wet sump
Gear Performance & Transmission
Maximum power33.4 kW {45 PS} / 10,000 rpm
CO2 emission91 g/km
Maximum torque37 N•m {3.8 kgf•m} / 8,000 rpm
Final driveSealed chain
Primary Reduction Ratio2.219 (71/32)
Gear Ratios 1st2.929 (41/14)
Gear Ratios 2nd2.056 (37/18)
Gear Ratios 3rd1.619 (34/21)
Gear Ratios 4th1.333 (32/24)
Gear Ratios 5th1.154 (30/26)
Gear Ratios 6th1.037 (28/27)
Final reduction ratio2.929 (41/14)
ClutchWet multi-disc, manual
Suspensions Brakes & Suspension
Brakes, frontSingle semi-floating 310 mm petal discs. Caliper: Single balanced actuation dual piston
Brakes, rearSingle 220 mm petal disc. Caliper: Dual-piston
Suspension, front41mm telescopic fork
Suspension, rearBottom-Link Uni-Trak, gas-charged shock with adjustable preload
Dimensions Frame & Dimensions
Frame typeTrellis, high-tensile steel
Trail92 mm
Wheel travel front120 mm
Wheel travel rear130 mm
Tyre, front110/70R17 M/C 54H
Tyre, rear150/60R17 M/C 66H
Tyre, rear150/60R17 M/C 66H
L x W x H1,990 x 710 x 1,120 mm
Wheelbase1,370 mm
Ground clearance140 mm
Fuel capacity14 litres
Seat height785 mm
Curb mass168 kg

Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).

2023 Kawasaki Ninja 400 Guide • Total Motorcycle (2024)
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