At the heart of the 2017 Kawasaki J125 scooter motorcycle, Kawasaki features a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 14 HP (10.2 kW) at 9,000 rpm while maximum torque reaches 11.5 Nm (8.5 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 112 HP per liter and a 2,000 rpm working window between peak torque (7,000 rpm) and peak power (9,000 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 J125 measures 182 kg (401 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (13 kg per horsepower). Rider ergonomics and chassis geometry center around a 775 mm (30.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,555 mm (61.2 in) wheelbase engineered for planted straight-line stability. The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 4 indexed model years from 2016 to 2020, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
112 HP/L
Power-to-Weight
0.08 HP/kg (13 kg/HP)
Power Band Window
7,000–9,000 rpm
Standover Height
775 mm (30.5 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power14.0 HP (10.2 kW)) @ 9000 RPM
Torque11.5 Nm (1.2 kgf-m or 8.5 ft.lbs) @ 7000 RPM
Compression11.0:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionECU Control (Full transistor)
LubricationForced lubrication, wet sump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchCVT with centrifugal clutch
Chassis
Frame TypeTubular diamond, steel
Rake28.0°
Trail113 mm (4.4 inches)
Front SuspensionTelescopic fork
Front Travel110 mm (4.3 inches)
Rear SuspensionTwin shocks with 5-way adjustable preload
Rear Travel100 mm (3.9 inches)
Wheelbase1555 mm (61.2 inches)
Ground Clearance145 mm (5.7 inches)
Wheels & Brakes
Front Tyre120/80-14
Rear Tyre150/70-13
Front BrakesSingle disc. Optional ABS
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. Optional ABS
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Weight incl.182.0 kg (401.2 pounds)
Seat Height775 mm (30.5 inches) If adjustable, lowest setting.
Overall Height1260 mm (49.6 inches)
Overall Length2235 mm (88.0 inches)
Overall Width775 mm (30.5 inches)
Fuel Capacity13.00 litres (3.43 US gallons)
Other
StarterElectric
Color OptionsMetallic Matte Frosted Ice White, Metallic Anthracite Black
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.
