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MotoLibrary Score
60/100Sporty
Power/Weight
0.6 hp/kg
Torque
111 Nm
Engine
1043 ccm
Technical Overview
2021 Kawasaki Ninja 1000SX SE Technical Analysis & Specification Breakdown
Engineered by Kawasaki for the sport motorcycle segment, the 2021 Kawasaki Ninja 1000SX SE relies on a 1043 cc (63.6 cu in) liquid-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 140.1 HP (102.3 kW) at 10,000 rpm while maximum torque reaches 111 Nm (81.9 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 134.3 HP per liter and a 2,000 rpm working window between peak torque (8,000 rpm) and peak power (10,000 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 Ninja 1000SX SE measures 235 kg (518 lbs) wet (curb), translating to a power-to-weight ratio of 0.6 HP/kg (1.68 kg per horsepower). Rider ergonomics and chassis geometry center around a 835 mm (32.9 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,440 mm (56.7 in) wheelbase engineered for balanced agility and highway composure. The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
134.3 HP/L
Power-to-Weight
0.6 HP/kg (1.68 kg/HP)
Power Band Window
8,000–10,000 rpm
Standover Height
835 mm (32.9 in)
Engine
Displacement1043.0 ccm (63.64 cubic inches)
Engine TypeIn-line four, four-stroke
Power140.1 HP (102.3 kW)) @ 10000 RPM
Torque111.0 Nm (11.3 kgf-m or 81.9 ft.lbs) @ 8000 RPM
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.
