Sportbikes

2004Kawasaki Ninja ZX-6RR

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The 2004 Kawasaki Ninja ZX-6RR is a middleweight sport bike engineered for aggressive riders seeking track-capable performance in a nimble package. Its 599cc inline-four engine delivers sharp acceleration and high-revving power, while the lightweight perimeter frame and compact dimensions make it ideal for precision cornering and quick directional changes. Best known for blending accessible power with razor-sharp handling, it appeals to experienced sport riders prioritizing agility over displacement.

Capacity: 599.0 ccm
Engine: In-line four, four-stroke
Gearbox: 6-speed
Dry weight: 161.0 kg
Seat height: 826 mm
Power: 107.8 HP (79.3 kW)

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Other years 2004 2005 2006

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering96%

City riding35%

Daily riding30%

Touring20%

Two-up15%

Track96%

Best for: It exists primarily for track days and competitive club racing, with road use very much a secondary consideration.
Built for: A razor-sharp, race-bred machine that rewards precise inputs and high-revving commitment with telepathic handling and blistering top-end speed.
Not ideal for: This is not the bike for new riders, commuters seeking comfort, or anyone wanting a passenger-friendly or touring-capable machine.

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 826mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with balls of both feet on the 2004 Kawasaki Ninja ZX-6RR, 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 821-900 mm — Long Legs →

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Full specifications

Engine

Capacity: 599.0 ccm
Power: 107.8 HP (79.3 kW)
Engine type: In-line four, four-stroke
Power/weight ratio: 0.6696 HP/kg (dry)
Bore x stroke: 67.0 x 42.5 mm
Compression: 13.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Digital
Valves per cylinder: 4
Lubrication system: Wet sump
Torque: Not on record - add it

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet multi-disc

Dimensions & weight

Wheelbase: 1400 mm
Seat height: 826 mm
Dry weight: 161.0 kg
Fuel capacity: 18.20 litres
Ground clearance: 130 mm
Oil capacity: 4.00 litres

Chassis & suspension

Frame: Perimeter, pressed-aluminum
Front suspension: 41mm inverted cartridge fork with TiSiCN coating on inner fork tube, rebound and compression damping, plus spring preload adjustability and top-out springs
Rear suspension: Bottom-link UNI-TRAK® with gas-charged shock, stepless compression and rebound damping, spring preload adjustability and top-out spring
Front wheel travel: 119 mm
Rear wheel travel: 132 mm
Rake (fork angle): 25.0°
Trail: 109 mm