Kawasaki GPz 750 Turbo / ZX750-E1 (1983-85) vs Kawasaki GPX 250R / EX250 Ninja / ZZR 250 (2006-07) vs Kawasaki GPX 750R (1986-87) vs Kawasaki ZZ-R 400 (2002-03)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki | Kawasaki |
| Model: | GPz 750 Turbo / ZX750-E1 | GPX 250R / EX250 Ninja / ZZR 250 | GPX 750R | ZZ-R 400 |
| Years: | 1983-85 | 2006-07 | 1986-87 | 2002-03 |
| Engine: | Four stroke, turbocharged, transverse four cylinder, DOHC, 2 valves per cylinder | Four stroke . parallel twin, DOHC , 4 valve per cylinder | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder | Liquid cooled, four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 738 cc / 45.09 cu-in | 248 cc / 15.2 cu-in | 742 cc / 45.6 cu-in | 398 cc / 24.3 cu-in |
| Bore x Stroke: | 66 x 54 mm | 62 х 41.2mm | 68 x 51.5 mm | 57.5 x 38.5 mm |
| Compression Ratio: | 7.8:1 | 12.4:1 | 11.2:1 | 11.8:1 |
| Induction: | Mikuni fuel injection | 2x Keihin CVK30 Constant velocity, diaphragm-type | 4x 34mm Keihin CV carburetors | 4x Keihin CVK30 carburetors |
| Ignition: | Digital | Electronic advance | TCI (Transistor Controlled Ignition) | Digital |
| Max Power: | 112 hp / 82.4 kW @ 9000 rpm | 45 hp / 33.5 kW @ 11000 rpm | 106 hp / 74.5 kW @ 10500 rpm | 58 hp / 43.2 kW @ 12000 rpm |
| Max Torque: | 99.1Nm / 73.1ft-lb @ 6500 rpm | 24 Nm / 17.7 lb-ft @ 10000 rpm | 77.8 Nm / 57.3 lb-ft @ 8500 rpm | 3.7 kgf-m / 26.7 lb-ft @ 10000 rpm |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | 37mm air-adjustable forks, adjustable anti dive. | Telescopic forks | 38mm Telehydraulic forks electrically activated anti-dive | 41mm Telescopic forks |
| Rear Suspension: | Kawasaki Uni-Trak air-adjustable single shock, adjustable for rebound damping. | UNI-TRAK single shock | Unit-track air assisted 4-way rebound damping adjustment. | Rising rate monoshock |
| Front Brakes: | 2x 280mm discs | Single 260mm disc | 2x 270mm discs 4 piston calipers | 2x 300mm discs 4 piston calipers |
| Rear Brakes: | Single 270mm disc | Single 230mm disc | Single 230mm disc 2 piston caliper | Single 240mm disc 1 piston caliper |
| Front Tyre: | 110/90 V18 | 100/80-16 | 110/90-16 | 120/60-17 |
| Rear Tyre: | 130/80 V18 | 130/80-16 | 140/70-18 | 160/60-17 |
| Dry Weight: | 223 kg / 492 lbs | 138 kg / 304 lbs | 195 kg / 430 lbs | 197 kg / 434.3 lbs |
| Fuel Capacity: | 18 Litres / 4.8 US gal | 18 Litres / 4.7 US gal | 21 Litres / 5.5 US gal | 16 Litres / 4.7 US gal |