Kawasaki GPX 600R Ninja / ZX 600R (1987-88) vs BMW R 60/5 (1971-73) vs Suzuki Boulevard C50 SE (2005-06)
Comparison technical specifications
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| Make: | Kawasaki | BMW | Suzuki |
| Model: | GPX 600R Ninja / ZX 600R | R 60/5 | Boulevard C50 SE |
| Years: | 1987-88 | 1971-73 | 2005-06 |
| Engine: | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, 45° V-Twin |
| Capacity: | 598 cc / 36.1 cu-in | 599 cc / 36.6 cu in. | 805cc / 49.1 cu-in |
| Bore x Stroke: | 60 x 52.4 mm | 73.5 x 70.6 mm | 83 x 74.4 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 11.71 | 9.2:1 | 9.4:1 |
| Induction: | 4x 32mm Keihin CV carburetors | 2 x Bing slide carburetors | Mikuni BDSR34 |
| Ignition: | Digital | Battery ignition | Electronic |
| Starting: | Electric | Kick | Electric |
| Max Power: | 84 hp / 62 kW @ 11000 rpm | 29.5 kW / 40 hp @ 6400 rpm | 33.6 kW / 45.1 hp @ 4000 rpm |
| Max Torque: | 42 ft-lb / 5.8kgf-m @ 9000 rpm | 49 Nm / 5.0 kgf-m / 36 ft lb @ 5000 rpm | 62 Nm / 6.3 kgf-m / 45.7 ft-lb @ 4000 rpm |
| Clutch: | Wet, multiple discs, cable operated | Dry single plate, with diaphragm spring | Wet, multiple discs, cable operated |
| Transmission: | 6 Speed | 4 Speed | 5 Speed |
| Final Drive: | Chain | Shaft | Shaft |
| Front Suspension: | 38mm Telescopic with electronic anti-drive. | Telescopic hydraulic forks | Telescopic forks, coil spring oil damping |
| Rear Suspension: | Rising rate monoshock with adjustable preload and rebounding preload. | Long swinging arm with strut | Link-type single shock, 7-way adjustable preload |
| Front Brakes: | 2x 270mm discs | ∅200mm Drum | Single 300 mm disc 2 piston caliper |
| Rear Brakes: | Single 130mm disc | ∅200mm Drum | Drum, 180 mm |
| Front Tyre: | 110/80 V16 | 3.25 - S19 | 130/90-16M/C 67H |
| Rear Tyre: | 130/90 V16 | 4.00 - S18 | 170/80-15M/C 77H |
| Fuel Capacity: | 19.5 Litres / 5.1 US gal | 24 liters / 6.3 US gal | 15.5 Litres / 4.1 US gal |