Built around Kawasaki's scooter motorcycle platform, the 2020 Kawasaki J125 pairs a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, maximum torque reaches 10.9 Nm (8 lb-ft) at 7,750 rpm. Internal engine geometry specifies a bore and stroke of 54.0 x 54.5 mm (2.1 x 2.1 inches) with a 11.7:1 compression ratio.
On the scales, the J125 measures 182 kg (401 lbs) wet (curb). 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.
Standover Height
775 mm (30.5 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Torque10.9 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 7750 RPM
Compression11.7:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemInjection. ECU
Fuel ControlSingle Overhead Cams (SOHC)
LubricationForced lubrication, wet sump
CoolingLiquid
Chassis
Frame TypeTubular diamond
Trail113 mm (4.4 inches)
Front SuspensionTelescopi fork
Rear SuspensionTwin shocks with 5-way adjustable preload
Wheelbase1555 mm (61.2 inches)
Wheels & Brakes
Front Tyre120/80-14
Rear Tyre150/70-13
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
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 Height1285 mm (50.6 inches)
Overall Length2235 mm (88.0 inches)
Overall Width800 mm (31.5 inches)
Fuel Capacity13.00 litres (3.43 US gallons)
Other
StarterElectric
Color OptionsMetallic Flat Anthracite Black/Candy Flat Blazed Green9.45
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.
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.
