2025 Kawasaki Ninja 400 Specs & Review

The 2025 Kawasaki Ninja 400 remains a sweet-spot sportbike: approachable for newer riders yet entertaining for experienced ones. With a compact 399 cc parallel twin and a lightweight chassis, it blends weekday usability with weekend canyon fun. Here’s a concise look at the 2025 Kawasaki Ninja 400 specs and how they translate on the road.

Key Specs at a Glance

• Displacement: 399 cc
• Power: 33.4 kW (45 PS) @ 10,000 rpm
• Torque: 37.0 Nm @ 8,000 rpm
• Kawasaki Ninja 400 weight (wet): 168 kg
• Kawasaki Ninja 400 seat height: 785 mm
• Engine type: Liquid-cooled, 4-stroke, parallel twin; DOHC, 8 valves
• Transmission: 6-speed, return shift; Assist & Slipper Clutch
• Fuel tank capacity: 14.0 L

Engine & Performance

At the heart of the Ninja is a lively 399 cc parallel twin with a 70.0 x 51.8 mm bore and stroke and an 11.5:1 compression ratio. Output is a claimed 33.4 kW (45 PS) at 10,000 rpm with 37.0 Nm of torque at 8,000 rpm. In practical terms, this setup gives the bike a friendly, tractable bottom end for city riding, a strong midrange to slice through traffic, and enough top-end zest to keep highway merges and backroad sprints engaging.

Fuel injection (32 mm x 2) keeps response clean and predictable, while the 6-speed gearbox with Assist & Slipper Clutch smooths downshifts and reduces lever effort—especially welcome during aggressive riding or in stop-and-go traffic. Efficiency is solid too: the EU spec cites 3.9 L/100 km and 91 g/km CO2, underscoring the Ninja’s usability as a daily runner without dulling its sporty character.

Handling, Comfort & Kawasaki Ninja 400 Seat Height

The trellis, high-tensile steel frame and a 1,370 mm wheelbase give the Ninja 400 a planted yet quick-steering feel. Up front is a 41 mm telescopic fork, and the rear uses Kawasaki’s Bottom-link Uni-Trak with a gas-charged shock and spring preload adjustability, allowing riders to tailor sag for commuting, spirited rides, or a passenger.

Confidence at low speeds is aided by the Kawasaki Ninja 400 weight of 168 kg (wet), which helps the bike feel manageable during U-turns and parking maneuvers. The Kawasaki Ninja 400 seat height is 785 mm, striking a balance for a broad range of riders: approachable for shorter inseams while still offering legroom for taller riders. Ground clearance of 140 mm is sufficient for typical street obstacles, and compact dimensions (1,990 x 710 x 1,120 mm) add to the Ninja’s easy-going nature in crowded urban environments.

Tire sizes are well-judged for the platform—110/70R17 front and 150/60R17 rear—offering nimble turn-in without sacrificing stability on faster sweepers.

Equipment & Features

Braking hardware is straightforward and effective: a single 310 mm semi-floating petal disc up front with a dual-piston caliper, and a 220 mm petal disc at the rear, also with a dual-piston caliper. The sealed chain final drive is simple to maintain, and the 14.0 L fuel tank supports longer stints between fill-ups.

The frame is a trellis design for a balance of rigidity and weight, and the fueling is handled by dual 32 mm throttle bodies. No complicated electronic rider aids are listed here, keeping the experience pure and predictable.

Market notes: for 2025 in the U.S., this model is not offered and is replaced by the Ninja 500. In Japan, the latest listing carries model code 8BL-EX400L with new colorways including Metallic Matte Graphene Steel Gray × Metallic Flat Spark Black and Metallic Spark Black × Metallic Magnetic Dark Gray.

Who Is the 2025 Kawasaki Ninja 400 For?

This bike fits a wide range of riders. Newer riders will appreciate the friendly power delivery, reasonable Kawasaki Ninja 400 seat height, and approachable Kawasaki Ninja 400 weight. Commuters will value the efficiency, compact size, and smooth fueling, while experienced riders seeking a lightweight, rewarding sportbike will enjoy the engaging parallel twin and responsive chassis for weekend rides or occasional track days.

If you want a sporty feel without the intimidation or cost of larger displacement machines, the Ninja 400 remains an excellent choice.

Torquepedia Verdict

As a complete package, the 2025 Kawasaki Ninja 400 hits the mark: lively 399 cc performance, manageable mass, and quality chassis components that deliver confidence. The engine’s 33.4 kW (45 PS) and 37.0 Nm strike a practical balance between everyday usability and spirited riding, and the Assist & Slipper Clutch adds polish to the drivetrain.

Its straightforward equipment list keeps costs and complexity down while still covering the essentials, and the chassis setup (41 mm fork, Uni-Trak rear) is well matched to the platform. If you’re in a region where it’s offered and you want a lightweight sportbike without stepping into bigger, heavier classes, this Kawasaki Ninja 400 review concludes that it should be high on your shortlist.

FAQ

• Is the 2025 Kawasaki Ninja 400 good for beginners? Yes. Its manageable 399 cc parallel twin, 168 kg wet weight, and smooth 6-speed with Assist & Slipper Clutch make it friendly for newer riders while still engaging for experienced ones.

• What is the seat height of the 2025 Kawasaki Ninja 400? The Kawasaki Ninja 400 seat height is 785 mm.

• How heavy is the 2025 Kawasaki Ninja 400? The Kawasaki Ninja 400 weight is 168 kg (wet).

• What are the key 2025 Kawasaki Ninja 400 specs? 399 cc parallel twin; 33.4 kW (45 PS) @ 10,000 rpm; 37.0 Nm @ 8,000 rpm; 6-speed with Assist & Slipper Clutch; 14.0 L tank; trellis steel frame; 41 mm fork; Uni-Trak rear shock with preload adjustability.

• Is the 2025 Ninja 400 available in the U.S.? According to the 2025 market note, it is not offered in Kawasaki USA’s lineup and is replaced by the Ninja 500.