Engineered by Kawasaki for the sport motorcycle segment, the 2018 Kawasaki Ninja ZX-6R utilizes a 599 cc (36.6 cu in) liquid-cooled in-line four, four-stroke layout. In factory specification, peak output is rated at 126.2 HP (92.1 kW) at 14,000 rpm while maximum torque reaches 66.7 Nm (49.2 lb-ft) at 6,800 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 210.7 HP per liter and a 7,200 rpm working window between peak torque (6,800 rpm) and peak power (14,000 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the Ninja ZX-6R measures 194 kg (428 lbs) wet (curb), translating to a power-to-weight ratio of 0.65 HP/kg (1.54 kg per horsepower). Rider ergonomics and chassis geometry center around a 815 mm (32.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,400 mm (55.1 in) wheelbase engineered for quick, flickable steering geometry. The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 16 indexed model years from 2004 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
210.7 HP/L
Power-to-Weight
0.65 HP/kg (1.54 kg/HP)
Power Band Window
6,800–14,000 rpm
Standover Height
815 mm (32.1 in)
Engine
Displacement599.0 ccm (36.55 cubic inches)
Engine TypeIn-line four, four-stroke
Engine DetailsIn-line four, four-stroke
Power126.2 HP (92.1 kW)) @ 14000 RPM
Torque66.7 Nm (6.8 kgf-m or 49.2 ft.lbs) @ 6800 RPM
Compression12.9:1
Bore x Stroke67.0 x 45.1 mm (2.6 x 1.8 inches)
Valves/Cylinder4
Fuel SystemInjection. DFI® with 38mm Keihin 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)
ClutchWet multi-disc, manual
DrivelineSealed chain
Chassis
Frame TypeAluminum perimeter
Rake23.5°
Trail102 mm (4.0 inches)
Front Suspension41mm inverted Showa SFF-BP fork with top-out springs, stepless compression and rebound damping, adjustable spring preload
Front Travel119 mm (4.7 inches)
Rear SuspensionBottom-Link Uni-Trak with gas-charged shock, top-out spring and pillow ball upper mount. Compression damping
Rear Travel134 mm (5.3 inches)
Wheelbase1400 mm (55.1 inches)
Ground Clearance120 mm (4.7 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre180/55-ZR17
Front BrakesDouble disc. Floating discs. Optional ABS.
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. Optional ABS.
Rear Brake Ø210 mm (8.3 inches)
Dimensions & Weight
Weight incl.194.0 kg (427.7 pounds)
Seat Height815 mm (32.1 inches) If adjustable, lowest setting.
Overall Height1115 mm (43.9 inches)
Overall Length2090 mm (82.3 inches)
Overall Width710 mm (28.0 inches)
Fuel Capacity17.00 litres (4.49 US gallons)
Other
StarterElectric
Color OptionsMetallic Matte Fusion Silver/Metallic Flat Spark Black
Notes
Maximum power with RAM air, 98.5 kW {134 PS} at 14,000 rpm. Kawasaki Traction Control (KTRC), Power Mode, Optional Kawasaki Intelligent anti-lock Brake System (KIBS).
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.
