Positioned in Kawasaki's scooter motorcycle lineup, the 2019 Kawasaki J300 pairs a 299 cc (18.2 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 27.2 HP (19.9 kW) at 8,000 rpm, transferring power to the rear wheel through belt final drive. With a specific output of 91 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the J300 measures 191 kg (421 lbs) wet (curb), translating to a power-to-weight ratio of 0.14 HP/kg (7.02 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 6 indexed model years from 2014 to 2020, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
91 HP/L
Power-to-Weight
0.14 HP/kg (7.02 kg/HP)
Standover Height
775 mm (30.5 in)
Engine
Displacement299.0 ccm (18.24 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power27.2 HP (19.9 kW)) @ 8000 RPM
Compression10.8:1
Bore x Stroke72.7 x 72.0 mm (2.9 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionECU Control (Full transistor)
LubricationForced lubrication, wet sump
CoolingLiquid
Transmission
Final DriveBelt (final drive)
Chassis
Frame TypeTubular diamond, steel
Trail113 mm (4.4 inches)
Front SuspensionTelescopic fork
Front Travel119 mm (4.7 inches)
Rear SuspensionTwin shocks with 5-way adjustable preload
Rear Travel130 mm (5.1 inches)
Wheelbase1555 mm (61.2 inches)
Ground Clearance145 mm (5.7 inches)
Wheels & Brakes
Front Tyre120/80-14M/C58S
Rear Tyre150/70-13M/C64S
Front BrakesSingle disc. Hydraulic. Two-piston calipers. Optional ABS.
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. Two-piston calipers.
Rear Brake Ø240 mm (9.4 inches)
Dimensions & Weight
Weight incl.191.0 kg (421.1 pounds)
Seat Height775 mm (30.5 inches) If adjustable, lowest setting.
Overall Length2235 mm (88.0 inches)
Overall Width715 mm (28.1 inches)
Fuel Capacity13.00 litres (3.43 US gallons)
Other
StarterElectric
Color OptionsMetallic Flat Anthracite Black/Candy Flat Blazed Green
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.
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.