At the heart of the 2021 Kawasaki Z900 70kW naked motorcycle, Kawasaki pairs a 948 cc (57.9 cu in) liquid-cooled in-line four, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 93.9 HP (68.5 kW) at 8,000 rpm while maximum torque reaches 91.2 Nm (67.3 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 99.1 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Z900 70kW measures 212 kg (467 lbs) wet (curb), translating to a power-to-weight ratio of 0.44 HP/kg (2.26 kg per horsepower). 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 paired with a rated consumption of 5.9 L/100 km provides an estimated theoretical range of roughly 289 km (180 miles) between fill-ups.
Specific Output
99.1 HP/L
Power-to-Weight
0.44 HP/kg (2.26 kg/HP)
Power Band Window
6,500–8,000 rpm
Theoretical Range
~289 km (180 mi)
Engine
Displacement948.0 ccm (57.85 cubic inches)
Engine TypeIn-line four, four-stroke
Power93.9 HP (68.5 kW)) @ 8000 RPM
Torque91.2 Nm (9.3 kgf-m or 67.3 ft.lbs) @ 6500 RPM
Compression11.8:1
Bore x Stroke73.4 x 56.0 mm (2.9 x 2.2 inches)
Valves/Cylinder4
Fuel SystemInjection. Ø 36 mm x 4 with sub-throttle
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCBI with electronic advance
LubricationForced lubrication, wet sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchAssist and Slipper Clutch
DrivelineSealed chain
Performance
Fuel Consumption5.90 litres/100 km (16.9 km/l or 39.87 mpg)
Greenhouse Gases136.9 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeTrellis, high tensile steel
Rake24.9°
Trail109 mm (4.3 inches)
Front Suspension41 mm inverted fork with stepless rebound damping and spring preload adjustability
Front Travel119 mm (4.7 inches)
Rear SuspensionHorizontal Back-link with rebound damping and spring preload adjustability
Rear Travel140 mm (5.5 inches)
Wheelbase1455 mm (57.3 inches)
Ground Clearance145 mm (5.7 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.
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.
