Kawasaki ZX-6R (2007) vs Ducati 125 Six Days (1977-78) vs Kawasaki GPz 900 Ninja (1997-00)
Comparison technical specifications
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| Make: | Kawasaki | Ducati | Kawasaki |
| Model: | ZX-6R | 125 Six Days | GPz 900 Ninja |
| Years: | 2007 | 1977-78 | 1997-00 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Two stroke, single cylinder, piston port | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 599 cc / 36.6 cub in | 123.7 cc / 7.5 cu in | 908 cc / 55.4 cu-in |
| Bore x Stroke: | 67 x 42.5 mm | 54 x 54 mm | 72.5 x 55 mm |
| Compression Ratio: | 13.9:1 | 14.6:1 | 11.0:1 |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled |
| Induction: | DFI® with four 38mm Keihin throttle bodies, oval sub-throttles, two injectors per throttle body | Dell'Orto PHBE 32 carburetor | 4x 34mm Keihin CVK34 carburettors |
| Ignition: | TCBI with Digital advance | Motoplat electronic | Battery ignition, full electronic! |
| Starting: | Electric | Kick | Electric |
| Max Power: | 91.9 kW /125 hp @ 14000 rpm | 18.38 kW / 25 hp @ 10250 rpm | 108 hp / 80.5 kW @ 9500 rpm |
| Transmission: | 6 Speed | 6-Speed | 6 Speed |
| Final Drive: | X-ring chain | Chain | Chain |
| Frame: | Perimeter, pressed-aluminium | Double cradle chromium molybdenum steel | Iron, Double cradle frame |
| Front Suspension: | 41 mm inverted cartridge fork with top-out springs, stepless rebound damping, stepless compression damping, fully-adjustable spring preload | 35mm Marzocchi with magnesium forks | 41mm Telescopic forks, air assisted four way anti dive. |
| Rear Suspension: | Bottom-Link Uni-Trak® with gas-charged shock, top-out spring and pillow ball upper mount, dual-range (high/low-speed) stepless compression damping, 25-way Adjustable rebound damping, fully-adjustable spring preload | Swinging arm with dual Marzocchi shocks | Uni-Trak air assisted, single shock, 4-way adjustable damping. |
| Front Brakes: | 2 x 300mm discs, 4 piston calipers | 125 mm drum | 2x 300mm discs 4 piston calipers |
| Rear Brakes: | Single 210mm disc, 1 piston caliper | 140 mm drum | Single 250mm disc 2 piston caliper |
| Front Tyre: | 120/65 ZR17 | 3.00 x 21 | 120/70-17 |
| Rear Tyre: | 180/55 ZR17 | 4.00 x 18 | 150/70-18 |
| Wheelbase: | 1405 mm / 55.3 in. | 1430 mm / 56.2 in | 1425 mm / 56.1 in |
| Seat Height: | 820 mm / 32.3 in. | 900 mm / 35.4 in | 790 mm / 31.1 in |
| Dry-Weight: | 167 kg / 368 lbs | 98 kg / 216 lbs | 228 kg / 502 lbs |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 8 Litres / 2.11 Us gal | 22 Litres / 5.8 US gal |