Kawasaki VN 900 Vulcan Custom (2007-08) vs Kawasaki GPz 600R Ninja / ZX 600R Ninja (1985-86) vs Kawasaki Z 650 (2017) vs Kawasaki VN 1700 Vulcan Voyager (2017-18)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki | Kawasaki |
| Model: | VN 900 Vulcan Custom | GPz 600R Ninja / ZX 600R Ninja | Z 650 | VN 1700 Vulcan Voyager |
| Years: | 2007-08 | 1985-86 | 2017 | 2017-18 |
| Engine: | Four stroke, V-twin, SOHC, 4 valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, parallel twin cylinder. DOHC, 4 valves per cylinder. | Four stroke, V-twin cylinder, SOHC, 8 valve per cylinder |
| Capacity: | 903 cc / 49 cu-in | 592 cc / 36.1 cu-in | 649 cc / 39.65 cu /in | 1700 cc / 103.7 cu in |
| Bore x Stroke: | 88.0 x 74.2 mm | 60 х 52.4 mm | 83 x 60 mm | 102 x 104mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 9.5:1 | 11.0:1 | 10.8:1 | 9.5:1 |
| Induction: | 2x 34mm ø Fuel injection with dual throttles | 4x 32mm Keihin CVK carburetors | DFI® with Keihin 36mm Keihin throttle bodies | Digital fuel injection, dual 42mm throttle bodies |
| Ignition: | Digital | Digital | TCBI with electronic advance | Digital |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 37 kW / 50 hp @ 5700 rpm | 75 hp / 54.7 kW @ 10500 rpm | 50.2 kW / 67.3 hp @ 8,500 rpm | 61 kW / 82 hp @ 5000 rpm |
| Max Torque: | 78 Nm / 8.0 kg-fm @ 3700 rpm | 5.1 kgf-m / 36.8 lb-ft @ 9000 rpm | 65.7 Nm / 48.4 lb-ft @ 7000 rpm | 146 Nm / 107 lb-ft @ 2750 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 6 Speed with overdrive |
| Final Drive: | Belt | Chain | Sealed chain | Carbon fiber belt |
| Front Suspension: | 41mm telescopic fork with 7-way preload | 37mm Air assisted forks, AVDS adjustable anti-dive | 41 mm hydraulic telescopic fork | 43mm hydraulic fork |
| Front Wheel Travel: | 150 mm / 5.9 in | 140 mm / 5.5 in | 125 mm / 4.9 in | 140 mm / 5.5 in |
| Rear Suspension: | Uni-Trak with 7-way adjustable preload | Single air assisted shock adjustable for rebound damping | Horizontal Back-link with adjustable preload | Swingarm with twin air-assisted shocks, with 4-way rebound damping |
| Rear Wheel Travel: | 103 mm / 4.1 in | 130 mm / 5.1 in | 130 mm / 5.1 in | 78 mm / 3.1 in |
| Front Brakes: | Single 300mm disc | 2x discs 1 piston calipers | 2x 300mm discs 2 piston calipers | 2x 300mm discs 2 piston calipers / ABS Optimal |
| Rear Brakes: | Single 270mm disc | Single disc 1 piston caliper | Single 220mm disc | Single 300mm disc 2 piston caliper / ABS Optimal |
| Front Tyre: | 80/90 -21 | 110/90-16 | 120/70 -17 | 130/90R16 |
| Rear Tyre: | 180/70 -15 | 130/90-16 | 160/50 -17 | 170/70R16 |
| Fuel Capacity: | 20 Litres / 5.3 US gal | 18 Litres / 4.7 US gal | 15 Litres / 4.0 US gal | 20 Litres / 5.3 US gal |