Sportbikes
2021Kawasaki Ninja 400 SE
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The 2021 Kawasaki Ninja 400 SE is an accessible sport bike designed for beginner and intermediate riders seeking an affordable entry into sportbike ownership. Its liquid-cooled 399cc parallel-twin engine delivers 44.8 horsepower with smooth power delivery, while the lightweight frame and nimble handling make it ideal for learning proper riding techniques. Known for reliability, fuel efficiency, and approachable performance, it remains a popular choice for new riders transitioning from smaller displacement motorcycles.
- Capacity
- 399.0 ccm
- Engine
- Parallel Twin, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 166.0 kg
- Seat height
- 785 mm
- Power
- 44.8 HP (32.7 kW) @ 10000 RPM
What’s new for the 2021 Kawasaki Ninja 400 SE
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front brakes | Single disc. Single petal-type disc with 2-piston calipers and ABS | Single disc. Single petal-type disc with 2-piston calipers and optional ABS |
| Rear brakes | Single disc. Single petal-type disc with single-piston caliper and ABS | Single disc. Single petal-type disc with single-piston caliper and optional ABS |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It is built primarily for sporty commuting and learning to ride fast on twisty roads rather than outright top-speed thrills.
- Built for
- The Ninja 400 SE has a playful, eager, high-revving personality that rewards riders who like to work the gearbox and carry corner speed.
- Not ideal for
- It is not a good fit for riders wanting long-distance touring comfort, heavy passenger loads, or big highway-passing power.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 399.0 ccm
- Power
- 44.8 HP (32.7 kW) @ 10000 RPM
- Torque
- 38.0 Nm (3.9 kgf-m) @ 8000 RPM
- Engine type
- Parallel Twin, four-stroke
- Power/weight ratio
- 0.2699 HP/kg (dry)
- Bore x stroke
- 70.0 x 51.8 mm
- Compression
- 11.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- TCBI
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Assist and Slipper Clutch
Dimensions & weight
- Wheelbase
- 1370 mm
- Overall length
- 1990 mm
- Overall width
- 710 mm
- Overall height
- 1125 mm
- Seat height
- 785 mm
- Dry weight
- 166.0 kg
- Wet weight
- 167.0 kg
- Fuel capacity
- 14.00 litres
- Ground clearance
- 140 mm
Chassis & suspension
- Frame
- Trellius, high- tensile steel
- Front suspension
- Telescopic fork
- Rear suspension
- Horizontal back-link with adjustable spring preload/5.1 in
- Rake (fork angle)
- 24.7°
- Trail
- 91 mm
Brakes & wheels
- Front brakes
- Single disc. Single petal-type disc with 2-piston calipers and optional ABS
- Front brakes diameter
- 310 mm
- Rear brakes
- Single disc. Single petal-type disc with single-piston caliper and optional ABS
- ABS
- Optional
- Front tyre
- 110/70-17
- Rear tyre
- 150/60-17
Other
- Color options
- Pearl Nightshade Teal/Metallic Spark Black, Passion Red, Metallic Graphite Gray/Metallic Magnetic Dark Gray
- Warranty
- 12
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2020 | 2021 |
|---|---|---|
| Capacity | 399 cc | 399 cc |
| Dry weight | 166 kg | 166 kg |
| Seat height | 785 mm | 785 mm |
| Fuel capacity | 14 L | 14 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Kawasaki Ninja 400 SE?
The 2021 Kawasaki Ninja 400 SE has a Capacity of 399.0 ccm (24.35 cubic inches).
What engine power does the Kawasaki Ninja 400 SE have?
The 2021 Kawasaki Ninja 400 SE has a Power of 44.8 HP (32.7 kW) @ 10000 RPM.
How many gears does the Kawasaki Ninja 400 SE have?
The 2021 Kawasaki Ninja 400 SE has a Gearbox of 6-speed.
What is the torque of the Kawasaki Ninja 400 SE?
The 2021 Kawasaki Ninja 400 SE has a Torque of 38.0 Nm (3.9 kgf-m or 28.0 ft.lbs) @ 8000 RPM.
How much does the Kawasaki Ninja 400 SE weigh?
The 2021 Kawasaki Ninja 400 SE has a Dry weight of 166.0 kg (366.0 pounds).
Shop this bike
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The 2021 Kawasaki Ninja 400 SE is a powerful and stylish motorcycle that delivers impressive performance on the road. Its 399cc parallel-twin engine provides plenty of power, making it a great choice for riders who want a thrilling and responsive ride. The Ninja 400 SE also features a lightweight chassis and agile handling, allowing riders to confidently navigate through tight turns and twisty roads. With its eye-catching design and sporty aesthetic, this motorcycle is sure to turn heads wherever it goes.
In addition to its impressive performance, the 2021 Kawasaki Ninja 400 SE also offers a comfortable riding experience with its ergonomic seating position and adjustable suspension. The motorcycle is equipped with advanced technology features such as a digital display and LED headlights, enhancing both its functionality and style. Whether you're a seasoned rider or a beginner looking for a powerful and capable motorcycle, the 2021 Kawasaki Ninja 400 SE is a top contender in its class. With its combination of performance, style, and comfort, this motorcycle is a standout choice for anyone looking for an exhilarating ride.
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