Engineered by Kawasaki for the sport motorcycle segment, the 2023 Kawasaki Ninja 125 relies on a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 15 HP (10.9 kW) at 10,000 rpm while maximum torque reaches 11.7 Nm (8.6 lb-ft) at 7,700 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 120 HP per liter and a 2,300 rpm working window between peak torque (7,700 rpm) and peak power (10,000 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 125 measures 149 kg (328 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (9.93 kg per horsepower). Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,330 mm (52.4 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 US gal) fuel tank paired with a rated consumption of 2.63 L/100 km provides an estimated theoretical range of roughly 418 km (260 miles) between fill-ups.
Within MotoLibrary's Kawasaki archive, this model family spans 6 indexed model years from 2019 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
120 HP/L
Power-to-Weight
0.1 HP/kg (9.93 kg/HP)
Power Band Window
7,700–10,000 rpm
Theoretical Range
~418 km (260 mi)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power15.0 HP (10.9 kW)) @ 10000 RPM
Torque11.7 Nm (1.2 kgf-m or 8.6 ft.lbs) @ 7700 RPM
Compression11.7:1
Bore x Stroke58.0 x 47.2 mm (2.3 x 1.9 inches)
Valves/Cylinder4
Fuel SystemInjection. 28 mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital
LubricationForced lubrication, wet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMulti plate wet
Performance
Fuel Consumption2.63 litres/100 km (38.0 km/l or 89.44 mpg)
Greenhouse Gases61.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeTubular diamond, steel
Trail90 mm (3.5 inches)
Front Suspension37 mm telescopic fork
Front Travel110 mm (4.3 inches)
Rear SuspensionUni-Trak, gas-charged shock with adjustable preload
Rear Travel120 mm (4.7 inches)
Wheelbase1330 mm (52.4 inches)
Ground Clearance170 mm (6.7 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre130/70-17
Front BrakesSingle disc. Petal disc. Dual-piston caliper.
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.
