Ninja ZX-4R

Class-Leading Engine Performance
Ultra-Compact Nimble Supersport Chassis
Premium Components and Features


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Into a category filled with 400cc sport models, Kawasaki introduces a revolutionary Supersport model. The Ninja ZX-4R mounts a 400cc In-Line Four engine with class-leading performance in a compact chassis. On the track or on the street, experiencing the exhilaration of the Ninja ZX-4R’s unprecedented power, thrilling high-rpm wail, and its sharp, nimble handing will surely awaken the dormant Supersport within you.


Engine Type Liquid-cooled, 4-stroke, in-line four
Compression ratio 12.3:1
Valve system DOHC, 16 valves
Bore x stroke 57.0 x 39.1 mm
Displacement 399 cm³
Fuel System Fuel injection: 34 mm x 4
Lubrication Forced lubrication, wet sump
Starting system Electric
Ignition Digital

Performance & Transmission:

Maximum power 57.0 kW {77 PS} / 14,500 rpm
Maximum power with RAM Air 58.7 kW {80 PS} / 14,500 rpm
Maximum torque 39.0 N•m {4.0 kgf•m} / 13,000 rpm
Transmission 6-speed, return shift
Clutch Wet, multi disc
Primary reduction ratio 2.029 (69/34)
Gear ratios 1st 2.929 (41/14)
Gear ratios 2nd 2.056 (37/18)
Gear ratios 3rd 1.619 (34/21)
Gear ratios 4th 1.333 (32/24)
Gear ratios 5th 1.154 (30/26)
Gear ratios 6th 1.037 (28/27)
Final drive Sealed chain
Final reduction ratio 3.429 (48/14)

Frame & Dimensions:

Frame type Trellis, high-tensile steel
Trail 97 mm
Wheel travel front 120 mm
Wheel travel rear 112 mm
Tyre, front 120/70 ZR17 M/C (58W)
Tyre, rear 160/60 ZR17 M/C (69W)
L x W x H 1,990 x 765 x 1,110 mm
Steering angle L R 35° / 35°
Wheel base 1,380 mm
Ground clearance 135 mm
Fuel capacity 15.0 litres
Seat height 800 mm
Curb mass 189 kg

Brakes & Suspension:

Front brake type Dual semi-floating discs
Front brake diameter Ø 290 mm
Front brake caliper type Radial-mount, monobloc, opposed 4-piston
Rear brake type Single disc
Rear brake diameter Ø 220 mm
Rear brake caliper type Single-piston
Front suspension type Inverted Separate Function fork (SFF-BP) with top-out springs
Front suspension diameter Ø 37 mm
Rear suspension type Horizontal Back-link, gas-charged shock with spring preload adjustability


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