Engineered by Kawasaki for the sport motorcycle segment, the 2015 Kawasaki Ninja 400 features a 399 cc (24.4 cu in) liquid-cooled twin, four-stroke configuration. In factory specification, peak output is rated at 44 HP (32.1 kW) at 9,500 rpm while maximum torque reaches 37 Nm (27.3 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 110.3 HP per liter and a 2,000 rpm working window between peak torque (7,500 rpm) and peak power (9,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Ninja 400 measures 211 kg (465 lbs) wet (curb), translating to a power-to-weight ratio of 0.21 HP/kg (4.8 kg per horsepower). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,410 mm (55.5 in) wheelbase engineered for quick, flickable steering geometry. The 15.5-liter (4.1 US gal) fuel tank paired with a rated consumption of 2.67 L/100 km provides an estimated theoretical range of roughly 581 km (361 miles) between fill-ups.
Within MotoLibrary's Kawasaki archive, this model family spans 8 indexed model years from 2014 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
110.3 HP/L
Power-to-Weight
0.21 HP/kg (4.8 kg/HP)
Power Band Window
7,500–9,500 rpm
Theoretical Range
~581 km (361 mi)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power44.0 HP (32.1 kW)) @ 9500 RPM
Torque37.0 Nm (3.8 kgf-m or 27.3 ft.lbs) @ 7500 RPM
Valves/Cylinder4
Fuel SystemInjection. Digital
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationSemi-dry sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
DrivelineO-Ring Chain
Performance
Fuel Consumption2.67 litres/100 km (37.5 km/l or 88.10 mpg)
Greenhouse Gases61.9 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeDiamond, high-tensile steel
Rake25.0°
Trail106 mm (4.2 inches)
Front Suspension41mm hydraulic telescopic fork
Front Travel120 mm (4.7 inches)
Rear SuspensionSingle offset laydown shock with adjustable spring preload
Rear Travel130 mm (5.1 inches)
Wheelbase1410 mm (55.5 inches)
Wheels & Brakes
Front Tyre120/70-17
Rear Tyre160/60-17
Front BrakesDouble disc. Optional ABS. Triple petal.
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. Optional ABS
Rear Brake Ø220 mm (8.7 inches)
Wheels6-spoke black rims
Dimensions & Weight
Weight incl.211.0 kg (465.2 pounds)
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Overall Height1199 mm (47.2 inches)
Overall Length2101 mm (82.7 inches)
Overall Width759 mm (29.9 inches)
Fuel Capacity15.50 litres (4.10 US gallons)
Other
StarterElectric
Color OptionsGreen/black, red/black
InstrumentsRed digital speedometer, tachometer bar graph style, fuel gauge, clock, odomete
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
