Built around Kawasaki's atv motorcycle platform, the 2023 Kawasaki KFX90 utilizes a 89.9 cc (5.5 cu in) air-cooled single cylinder, four-stroke layout. Internal engine geometry specifies a bore and stroke of 47.0 x 51.8 mm (1.9 x 2.0 inches) with a 10.0:1 compression ratio.
On the scales, the KFX90 measures 122 kg (269 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 650 mm (25.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 965 mm (38 in) wheelbase engineered for quick, flickable steering geometry. The 5.5-liter (1.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 7 indexed model years from 2015 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
650 mm (25.6 in)
Engine
Displacement89.9 ccm (5.49 cubic inches)
Engine TypeSingle cylinder, four-stroke
Compression10.0:1
Bore x Stroke47.0 x 51.8 mm (1.9 x 2.0 inches)
Fuel SystemCarburettor. Keihin PTE 16
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionSolid state CDI
CoolingAir
Transmission
GearboxAutomatic
Final DriveChain (final drive)
ClutchAutomatic CVT
Driveline2WD
Chassis
Frame TypeDouble cradle, steel
Rake26.8°
Front SuspensionSingle A-arm with twin shock absorbers
Front Travel71 mm (2.8 inches)
Rear SuspensionSwingarm with single shock absorber
Rear Travel74 mm (2.9 inches)
Wheelbase965 mm (38.0 inches)
Ground Clearance100 mm (3.9 inches)
Wheels & Brakes
Front Tyre18/7-8
Rear Tyre18/9-8
Front BrakesExpanding brake (drum brake). Dual
Rear BrakesSingle disc. Hydraulic.
Dimensions & Weight
Weight incl.122.0 kg (269.0 pounds)
Seat Height650 mm (25.6 inches) If adjustable, lowest setting.
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.
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.
