The Ninja 400 offers the largest displacement in its category at 399cc with the sophistication of twin-cylinder power. Approachable power, superb ergonomics and class-leading performance offer a smooth, manageable ride that’s ideal for new riders while also alluring experienced riders. 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.

Next-level Power

The Ninja 400 motorcycle engine delivers the perfect balance of high-performance thrills and easy-to-use power.

Class-leading Power

The four-stroke, 399cc twin-cylinder is the largest displacement engine in its class and delivers smooth easy-to-use power for maximum rider confidence while also offering outstanding fuel efficiency.

Assist & Slipper Technology

The assist function provides an exceptionally light clutch pull and produces a wide clutch engagement range for comfort and confidence. The slipper function reduces the effect of back-torque for smooth and seamless downshifts. 2020 model shown.

Confident Acceleration

Best in class roll-on acceleration to confidently accelerate up to speed. 2020 model shown.

Nimble & Agile

The Ninja 400 motorcycle’s chassis dimensions were designed to deliver confident handling with a modern sporty feel at all speeds.

Lightweight & Agile

Similar in design to the unprecedented Ninja H2™ hypersport bike, the tube-type trellis frame is light in weight for smooth control and handling.

Progressive & dependable

The class leading semi-floating front disc brake delivers strong, progressive braking performance and is complemented by an Anti-lock Brake System (ABS)* that helps reduce wheel lock-up under certain conditions. *Model available in ABS and Non-ABS

Designed for Comfort

A sporty yet relaxed riding position accommodates a wide variety of riders and riding situations.

Sporty & Comfortable

Clip-on style handlebars offer a raised position for added comfort. 2020 model shown.

Easy & Accessible

A narrow seat design and low 30.9” seat height allows the rider to confidently reach the ground and creates a lower center of gravity for confident handling. 2020 model shown.

Added Comfort

Forward-oriented footpeg position contributes to comfortable ergonomics and a confident reach to the ground at stops.

Sharp & Modern

Aggressive Ninja styling boasts high-class modern design with superb fit and finish inspired by the larger displacement Ninja supersport bikes.


The high-grade cockpit of the Ninja 400 motorcycle features a multi-function dash meter that includes a gear position indicator.

Excellent Visibility

Twin LED headlights produce strong white lighting and include low and high beams as well as position lamps.


  • Maximum Power

    33.4 kW {45 PS} / 10,000 rpm

  • Maximum Torque

    38.0 N.m {3.9 kgf.m} / 8,000 rpm

  • Engine

    4-stroke Parallel Twin

  • Displacement

    399 cm3

  • Bore x Stroke

    70.0 × 51.8 mm

  • Compression Ratio


  • Valve System

    DOHC, 8 valves

  • Fuel System

    Fuel injection: o32 mm x 2

  • Ignition


  • Starting


  • Cooling


  • Lubrication

    Forced lubrication, wet sump

  • Transmission

    6-speed, return

  • Primary Reduction Ratio

    2.219 (71/32)

  • Gear Ratio: 1st

    2.928 (41/14)

  • Gear Ratio: 2nd

    2.055 (37/18)

  • Gear Ratio: 3rd

    1.619 (34/21)

  • Gear Ratio: 4th

    1.333 (32/24)

  • Gear Ratio: 5th

    1.154 (30/26)

  • Gear Ratio: 6th

    1.037 (28/27)

  • Final Reduction Ratio

    2.929 (41/14)

  • Clutch

    Wet multi-disc, manual

  • Final Drive



  • Frame

    Trellis, high-tensile steel

  • Front Suspension

    o41 mm telescopic fork

  • Rear Suspension

    Bottom-Link Uni-Trak, gas-charged shock with adjustable preload

  • Front Wheel Travel


  • Rear Wheel Travel


  • Rake


  • Trail


  • Steering Angle (L/R)

    35? / 35?

  • Front Tyre

    110/70R17 M/C 54H

  • Rear Tyre

    150/60R17 M/C 66H

  • Front Brake/s

    Single semi-floating o310 mm petal disc

  • Front Caliper/s

    Single balanced actuation dual-piston

  • Rear Brake

    Single o220 mm petal disc

  • Rear Caliper



  • Dimensions (LxWxH)

    1990 × 710 × 1120mm

  • Overall Length


  • Overall Width


  • Overall Height


  • Wheelbase


  • Road Clearance


  • Seat Height


  • Curb Mass

    168 kg

  • Fuel Capacity


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