14 August. Friday 2026
Kawasaki Ninja 400 SE - 2021 Specifications and Reviews
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.
2021
General information | |
| Category | Sport |
| Year | 2021 |
| Model | Kawasaki Ninja 400 SE |
| | |
Engine and Transmission Specifications | |
| Driveline | Sealed chain |
| Clutch | Assist and Slipper Clutch |
| Transmission type | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Ignition | TCBI |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection. DFI® with dual 32mm throttle bodies |
| Bore x Stroke | 70.0 x 51.8 mm (2.8 x 2.0 inches) |
| Compression | 11.5:1 |
| Torque | 38.0 Nm (3.9 kgf-m or 28.0 ft.lbs) @ 8000 RPM |
| Power | 44.8 HP (32.7 kW) @ 10000 RPM |
| Engine type | Twin, four-stroke |
| Capacity: | 399.0 ccm (24.35 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes | Single disc. Single petal-type disc with single-piston caliper and optional ABS |
| Diameter | 310 mm (12.2 inches) |
| Front brakes | Single disc. Single petal-type disc with 2-piston calipers and optional ABS |
| Rear tire | 150/60-17 |
| Front tire | 110/70-17 |
| Rear Suspension | Horizontal back-link with adjustable spring preload/5.1 in |
| Front Suspension | Telescopic fork |
| Trail | 91 mm (3.6 inches) |
| Rake (fork angle) | 24.7° |
| Frame type | Trellius, high- tensile steel |
Physical measures and capacities | |
| Fuel capacity | 14.00 litres (3.70 US gallons) |
| Wheelbase | 1370 mm (53.9 inches) |
| Ground clearance | 140 mm (5.5 inches) |
| Overall width | 710 mm (28.0 inches) |
| Overall length | 1990 mm (78.3 inches) |
| Overall height | 1125 mm (44.3 inches) |
| Seat height | 785 mm (30.9 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 167.0 kg (368.2 pounds) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Factory warranty | 12 months |
| Starter | Electric |
| Color options | Pearl Nightshade Teal/Metallic Spark Black, Passion Red, Metallic Graphite Gray/Metallic Magnetic Dark Gray |
Performance Profile & Rider Fit
44.8 hp
Peak Power
5.5s
0-60 mph
Best For
Track65%
City85%
Cornering80%
Daily Riding75%
Touring40%
Passenger35%
Rider Profile
| Best For | This is an excellent bike for beginner to intermediate riders thanks to its manageable power delivery and light, confidence-inspiring chassis. |
| Purpose | It is built primarily for sporty commuting and learning to ride fast on twisty roads rather than outright top-speed thrills. |
| Rider Fit | Its low seat height and light weight make it accessible to shorter and less physically strong riders. |
| Character | 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. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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Rider Reviews
Total comments: 1
MotorcycleDB Review
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.Add a Comment
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