Positioned in Kawasaki's sport motorcycle lineup, the 2025 Kawasaki Ninja ZX-4R ABS utilizes a 399 cc (24.4 cu in) liquid-cooled in-line four, four-stroke layout. In factory specification, peak output is rated at 56 HP (40.9 kW) at 11,500 rpm while maximum torque reaches 35.9 Nm (26.5 lb-ft) at 11,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 140.4 HP per liter and a 500 rpm working window between peak torque (11,000 rpm) and peak power (11,500 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the Ninja ZX-4R ABS measures 188 kg (414 lbs) wet (curb), translating to a power-to-weight ratio of 0.3 HP/kg (3.36 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,379 mm (54.3 in) wheelbase engineered for quick, flickable steering geometry. The 15.14-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 2 indexed model years from 2024 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
140.4 HP/L
Power-to-Weight
0.3 HP/kg (3.36 kg/HP)
Power Band Window
11,000–11,500 rpm
Standover Height
800 mm (31.5 in)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeIn-line four, four-stroke
Power56.0 HP (40.9 kW)) @ 11500 RPM
Torque35.9 Nm (3.7 kgf-m or 26.5 ft.lbs) @ 11000 RPM
Compression12.3:1
Bore x Stroke57.0 x 39.1 mm (2.2 x 1.5 inches)
Valves/Cylinder4
Fuel SystemInjection. DFI® with 34mm throttle bodies (4) and oval sub-throttles
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCBI with digital advance
LubricationForced lubrication, wet sump with oil cooler
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchAssist and Slipper clutch
DrivelineSealed chain
Chassis
Frame TypeTrellis, high-tensile steel
Rake23.5°
Trail97 mm (3.8 inches)
Front Suspension37mm inverted Showa SFF-BP fork with top-out springs, stepless compression and rebound damping, adjustable spring preload
Front Travel119 mm (4.7 inches)
Rear SuspensionHorizontal Back-link, Showa shock w/ adjustable spring preload
Rear Travel112 mm (4.4 inches)
Wheelbase1379 mm (54.3 inches)
Ground Clearance135 mm (5.3 inches)
Wheels & Brakes
Front Tyre110/70-ZR17
Rear Tyre150/60-ZR17
Front BrakesDouble disc. Dual discs, ABS
Front Brake Ø290 mm (11.4 inches)
Rear BrakesSingle disc. Single disc, ABS
Rear Brake Ø220 mm (8.7 inches)
WheelsAluminium rims, 6-spoke. Pirelli Diablo Rosso IV tires.
Dimensions & Weight
Weight incl.188.0 kg (414.5 pounds)
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
Overall Height1110 mm (43.7 inches)
Overall Length1989 mm (78.3 inches)
Overall Width765 mm (30.1 inches)
Fuel Capacity15.14 litres (4.00 US gallons)
Other
StarterElectric
Color OptionsMetallic Spark Black
Instruments4.3´ Full-Color TFT Instrumentation
Warranty12 Month Limited Warranty
Notes
Economical Riding Indicator, Kawasaki TRaction Control (KTRC) (3-mode), Power Modes, Anti-lock Brake System (ABS)
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.
