Engineered by Kawasaki for the naked motorcycle segment, the 2021 Kawasaki Z900 pairs a 948 cc (57.9 cu in) liquid-cooled in-line four, four-stroke architecture with road-focused gearing. In factory specification, maximum torque reaches 99.1 Nm (73.1 lb-ft) at 7,700 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. Internal engine geometry specifies a bore and stroke of 73.4 x 56.0 mm (2.9 x 2.2 inches) with a 11.8:1 compression ratio.
On the scales, the Z900 measures 212.1 kg (468 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,455 mm (57.3 in) wheelbase engineered for balanced agility and highway composure. The 17.03-liter (4.5 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 2017 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
800 mm (31.5 in)
Engine
Displacement948.0 ccm (57.85 cubic inches)
Engine TypeIn-line four, four-stroke
Torque99.1 Nm (10.1 kgf-m or 73.1 ft.lbs) @ 7700 RPM
Compression11.8:1
Bore x Stroke73.4 x 56.0 mm (2.9 x 2.2 inches)
Valves/Cylinder4
Fuel SystemInjection. DFI with 36mm Keihin throttle bodies
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCBI with electronic advance
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchAssist and Slipper Clutch
DrivelineSealed chain
Chassis
Frame TypeTrellis, high tensile steel
Rake24.9°
Trail109 mm (4.3 inches)
Front Suspension41mm inverted fork with rebound damping and spring preload adjustability
Front Travel119 mm (4.7 inches)
Rear SuspensionHorizontal back-link, stepless rebound damping, adjustable spring preload
Rear Travel140 mm (5.5 inches)
Wheelbase1455 mm (57.3 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre180/55-ZR17
Front BrakesDouble disc. Optional ABS. Four-piston calipers.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
