14 August. Friday 2026
Kawasaki Ninja 400 KRT - 2021 Specifications and Reviews
The 2021 Kawasaki Ninja 400 KRT is an entry-level sportbike designed for new and younger riders seeking an accessible gateway into sport motorcycle riding. Its lightweight 399cc twin-cylinder engine delivers manageable power with modern features like assist and slipper clutch, making it ideal for learning fundamental riding skills. Known for its nimble handling, fuel efficiency, and approachable performance, the Ninja 400 KRT strikes the perfect balance between excitement and control for novice riders.
General information | |
| Category | Sport |
| Year | 2021 |
| Model | Kawasaki Ninja 400 KRT |
| | |
Engine and Transmission Specifications | |
| Clutch | Assist and Slipper Clutch |
| Transmission type | Chain (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Forced lubrication, wet sump |
| Ignition | TCBI w/digital advance |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection. 32 mm x 2 |
| Bore x Stroke | 70.0 x 51.8 mm (2.8 x 2.0 inches) |
| Compression | 11.5:1 |
| Engine type | Twin, four-stroke |
| Capacity: | 399.0 ccm (24.35 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes | Single disc. Petal-type disc with single-piston caliper. Optional ABS. |
| Diameter | 310 mm (12.2 inches) |
| Front brakes | Single disc. Petal-type disc with 2-piston calipers. Optional ABS. |
| Rear tire | 150/70-17 |
| Front tire | 110/70-17 |
| Rear wheel travel | 130 mm (5.1 inches) |
| Rear Suspension | Horizontal back-link with adjustable spring preload |
| Front wheel travel | 119 mm (4.7 inches) |
| Front Suspension | 41mm hydraulic telescopic fork |
| Trail | 91 mm (3.6 inches) |
| Rake (fork angle) | 24.7° |
| Frame type | Trellis, high-tensile steel |
Physical measures and capacities | |
| Fuel capacity | 3.70 litres (0.98 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 | 1120 mm (44.1 inches) |
| Seat height | 785 mm (30.9 inches) If adjustable, lowest setting. |
| Dry weight | 165.0 kg (363.8 pounds) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Comments | Special Kawasaki Racing Team (KRT) edition. Small windscreen. Economical Riding Indicator. |
| Factory warranty | 12 Month Limited Warranty |
| Starter | Electric |
| Color options | Lime Green/Ebony/Pearl Blizzard White |
Performance Profile & Rider Fit
52.3 hp
Peak Power (est.)
5.2s
0-60 mph (est.)
Best For
Track45%
City70%
Cornering65%
Daily Riding72%
Touring58%
Passenger55%
Rider Profile
| Best For | Note: the specifications provided are actually for the Kawasaki Ninja 650, not the Ninja 400 KRT named in the request, so this profile reflects the 650's larger twin-cylinder platform; a beginner-friendly rider with some months of experience or a returnin |
| Purpose | Built as an approachable sport bike for mixed commuting, weekend twisty-road fun, and occasional longer rides rather than dedicated track use. |
| Rider Fit | A moderate seat height and manageable overall weight make it accessible to riders of average and smaller stature, though the sportier riding position adds some wrist and wrist loading on long stints. |
| Character | A friendly, torquey parallel twin with a trellis frame and slipper clutch gives confident, predictable handling that rewards smooth inputs over outright aggression. |
| Not Ideal For | Not the right choice for riders seeking serious off-road capability or those wanting flagship superbike-level top-end power and track performance. |
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 KRT is a powerful and stylish sports bike that delivers an impressive performance on the road. With its 399cc parallel-twin engine, this motorcycle offers a thrilling riding experience with smooth power delivery and quick acceleration. The KRT edition features the iconic Kawasaki Racing Team colors, giving it a striking and aggressive look that is sure to turn heads. Plus, with its lightweight chassis and responsive handling, the Ninja 400 KRT is a joy to ride, whether you're navigating city streets or hitting the open road. In addition to its impressive performance, the 2021 Kawasaki Ninja 400 KRT also offers a comfortable and ergonomic riding position, making it suitable for long rides. The bike's advanced braking system and ABS provide excellent stopping power and safety, while its high-quality components and build ensure durability and reliability. Overall, the Ninja 400 KRT is a fantastic choice for riders looking for a combination of style, performance, and comfort in a sporty motorcycle.Add a Comment
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