Sportbikes

2025Kawasaki Ninja ZX 4RR Performance

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The 2025 Kawasaki Ninja ZX 4RR Performance is a screaming small-capacity sportbike for riders who chase revs rather than raw grunt. Its 399 cc in-line four spins out 76.4 hp at 14,500 rpm, backed by adjustable Showa suspension and a quickshifter. It's best known for delivering genuine superbike character and soundtrack in a lightweight, track-ready, road-legal package.

Capacity: 399.0 ccm
Engine: In-line four, four-stroke
Gearbox: 6-speed
Dry weight: 166.0 kg
Seat height: 800 mm
Power: 76.4 HP (57.0 kW) @ 14500 RPM

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Other years 2025 2026

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering92%

City riding45%

Daily riding40%

Touring30%

Two-up25%

Track90%

Best for: Built primarily for spirited canyon carving and track days, with its screaming inline-four rewarding riders who explore the upper rev range.
Built for: A rev-happy, high-revving inline-four sportbike that thrives on high RPM excitement rather than low-end torque, delivering a thrilling, engaging ride when pushed hard.
Not ideal for: Not a good fit for riders seeking a relaxed commuter, long-distance tourer, or anyone wanting strong low-speed torque without working the gearbox.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 800mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2025 Kawasaki Ninja ZX 4RR Performance, with a cramped knee angle of around 70 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 751-820 mm — Middle Ground →

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Full specifications

Engine

Capacity: 399.0 ccm
Power: 76.4 HP (57.0 kW) @ 14500 RPM
Torque: 39.0 Nm (4.0 kgf-m) @ 13000 RPM
Engine type: In-line four, four-stroke
Power/weight ratio: 0.4602 HP/kg (dry)
Bore x stroke: 57.0 x 39.1 mm
Compression: 12.3:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Digital
Valves per cylinder: 4

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Assist and Slipper Clutch

Performance

0-60 mph: 4.20 seconds
0-100 km/h (0-62 mph): 4.60 seconds

Dimensions & weight

Wheelbase: 1379 mm
Overall length: 1989 mm
Overall width: 765 mm
Overall height: 1110 mm
Seat height: 800 mm
Dry weight: 166.0 kg
Wet weight: 188.0 kg
Fuel capacity: 15.10 litres
Ground clearance: 135 mm

Chassis & suspension

Frame: Trellis, high-tensile steel
Front suspension: 37mm inverted fork with SFF-BP internals and spring preload adjustability
Rear suspension: Horizontal Back-link, BFRC lite gas charged shock w/ piggyback reservoir, adjustable compression, rebound and spring preload
Front wheel travel: 119 mm
Rear wheel travel: 124 mm
Rake (fork angle): 23.5°
Trail: 97 mm

Brakes & wheels

Front brakes: Double disc. ABS.
Front brakes diameter: 290 mm
Rear brakes: Single disc. ABS.
Rear brakes diameter: 220 mm
ABS: Yes
Front tyre: 120/70-17
Rear tyre: 160/60-17

Other

Color options: Lime Green/Ebony/Pearl Blizzard White
Comments: Kawasaki spec: 57.0 kW (77 PS) at 14,500 rpm; 58.7 kW (80 PS) with RAM air. RR adds preload-adjustable fork, Showa BFRC lite rear shock (as on ZX-10R) and two-way quick shifter (KQS).

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.