Kawasaki Z 650 Custom / KZ650C (1979) vs Kawasaki GPz 750 / Z 750GP (1985) vs Kawasaki GPz 1100 / ZX1100 A-3 (1985)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki |
| Model: | Z 650 Custom / KZ650C | GPz 750 / Z 750GP | GPz 1100 / ZX1100 A-3 |
| Years: | 1979 | 1985 | 1985 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. |
| Capacity: | 652 cc / 39.7 in | 738 cc / 45.0 cu-in | 1089 cc / 66.4 cu-in |
| Bore x Stroke: | 62 х 54 mm | 66 х 54 mm | 72.5 x 66 mm |
| Cooling System: | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 9.5:1 | 9.5:1 | 8.9:1 |
| Induction: | 4x 28mm Mikuni carburetors | 4x 36mm Mikuni carburetors | Digital fuel injection |
| Ignition: | Battery & coil | Digital | Battery powered inductive magnetically triggered. |
| Starting: | Electric & kick | Electric | Electric |
| Max Power: | 66 hp / 48.2 kW @ 8500 rpm | 87 hp / 63.5 kW @ 9500 RPM (rear tyre 77 hp @ 9550 rpm) | 120 hp / 87.6 kW @ 8750 rpm |
| Max Torque: | 5.8 kgf-m / 57 Nm @ 7000 rpm | 6.4 kgf-m / 46.2 lb-ft @ 7500 rpm | 10.2 kgf-m / 73.7 lb-ft @ 7000 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic forks | Air assisted forks | 37mm Kayaba hydraulically activated air drive abutments for air pressure |
| Rear Suspension: | Swinging arm | Single shock swinging arm, | Single air assisted shock adjustable for reload damping |
| Front Brakes: | 2X 231mm discs | 2x 240mm discs | 2x 236mm discs 1 piston calipers |
| Rear Brakes: | Single 220mm disc | Single 210mm disc | Single 236mm disc1 caliper |
| Front Tyre: | 3.25-19 | 110/90-18 | 110/90 V18 |
| Rear Tyre: | 4.00-18 | 130/80-18 | 130/90 V17 |
| Wet Weight: | 237 kg / 522.4 lbs | 241 mm / 531 lbs | 261 kg / 574.5 lbs |
| Fuel Capacity: | 16.5 Litres / 4.3 US gal | 18 Litres / 4.7 US gal | 20 Litres / 5.2 US gal |