Kawasaki VN 900 Vulcan Custom (2007-08) vs Yamaha XSR 900 GP (Japan only) (2024) vs KTM 1390 Super Duke GT (2025) vs Kawasaki Z 650 (2017) vs Triumph Speed Triple RS (2020)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | KTM | Kawasaki | Triumph |
| Model: | VN 900 Vulcan Custom | XSR 900 GP (Japan only) | 1390 Super Duke GT | Z 650 | Speed Triple RS |
| Years: | 2007-08 | 2024 | 2025 | 2017 | 2020 |
| Engine: | Four stroke, V-twin, SOHC, 4 valves per cylinder | Four stroke, transverse triple cylinder, DOHC, 4 valves per cylinder | Four stroke, 75? V-twin cylinder, DOHC, 4 valves per cylinder, variable valve system | Four stroke, parallel twin cylinder. DOHC, 4 valves per cylinder. | Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 903 cc / 49 cu-in | 889 cc / 54.2 cu-in | 1350 cc / 82.3 cu-in | 649 cc / 39.65 cu /in | 1050 cc / 64.1 cub in |
| Bore x Stroke: | 88.0 x 74.2 mm | 78 x 62.1 mm | 110 x 71 mm | 83 x 60 mm | 79 x 71.4 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled with water/oil heat exchanger | Liquid cooled | Liquid-cooled |
| Compression Ratio: | 9.5:1 | 11.5:1 | 13.2:1 | 10.8:1 | 12.92:1 |
| Ignition: | Digital | TCI: Transistor Controlled Ignition | Keihin EMS with RBW and cruise control, double ignition | TCBI with electronic advance | Electronic |
| Starting: | Electric | Electric | Electric | Electric | Electric |
| Max Power: | 37 kW / 50 hp @ 5700 rpm | 117.4 hp / 87.5 kW @ 10000 rpm | 140 kW / 187.7 hp @ 10 000 rpm | 50.2 kW / 67.3 hp @ 8,500 rpm | 148 hp / 110 kW @ 10500 rpm |
| Max Torque: | 78 Nm / 8.0 kg-fm @ 3700 rpm | 93 Nm / 68.6 lb-ft @ 7000 rpm | 145 Nm / 106.9 lb-ft @ 8 000 rpm | 65.7 Nm / 48.4 lb-ft @ 7000 rpm | 117 Nm / 86.2 lb-ft @ 7150 rpm |
| Clutch: | Wet multi-disc, manual | Multiplate assist and slipper clutch | PASC (TM) slipper clutch, hydraulically actuated | Wet multi-disc, manual | Wet, multi-plate slip assist clutch |
| Transmission: | 5 Speed | 6 Speed | 6-speed | 6 Speed | 6 Speed |
| Final Drive: | Belt | O-ring chain | 525 X-Ring | Sealed chain | X ring chain |
| Frame: | Double-cradle, steel | Diamond | Chrome-moly tubular space frame, powder-coated | Semi-double cradle, high-tensile steel | Aluminium beam twin-spar, single sided swingarm, aluminium alloy with eccentric chain adjuster |
| Front Suspension: | 41mm telescopic fork with 7-way preload | 41mm inverted fork, adjustable rebound and spring preload | Fully adjustable WP APEX SAT open cartridge forks, with electronic damping adjustment | 41 mm hydraulic telescopic fork | Öhlins 43 mm NIX30 upside down forks with adjustable preload, rebound and compression damping |
| Front Wheel Travel: | 150 mm / 5.9 in | 130 mm / 5.1 in | 125 mm / 4.9 in | 125 mm / 4.9 in | 120 mm / 4.7 in |
| Rear Suspension: | Uni-Trak with 7-way adjustable preload | Single shock absorber, link type suspension, swingarm | WP APEX PRO Monoshock. Evo: Semi-active technology (SAT) | Horizontal Back-link with adjustable preload | Öhlins TTX36 twin tube monoshock with preload, rebound and compression damping |
| Rear Wheel Travel: | 103 mm / 4.1 in | 137 mm / 5.3 in | 140 mm / 5.5 in | 130 mm / 5.1 in | 130 mm / 5.1 in |
| Front Brakes: | Single 300mm disc | 2 x 298mm Hydraulic discs 4 piston caliper | 2 x 320 mm Brembo Stylema Monobloc four piston, radially mounted caliper | 2x 300mm discs 2 piston calipers | 2 x 320mm floating discs, Brembo 4 piston monobloc radial calipers, switchable ABS |
| Rear Brakes: | Single 270mm disc | Single 245mm Hydraulic disc 2 piston caliper | Single 240 mm disc Brembo twin-piston fixed caliper | Single 220mm disc | Single 255mm disc, Nissin 2 piston sliding caliper, switchable ABS |
| Front Tyre: | 80/90 -21 | 120/70 ZR17M/C (58W) Tubeless | 120/70 Michelin Power 6 | 120/70 -17 | 120/70 ZR17 |
| Rear Tyre: | 180/70 -15 | 180/55ZR17M/C (73W) Tubeless | 200/55 Michelin Power 6 | 160/50 -17 | 190/55 ZR17 |
| Dimensions: | Length 2405 mm / 94.7 ub Width 894 mm / 35.2 in Heigh 1120 mm / 44.1 in | Length 2155 mm / 84.8 in Width 860 mm / 33.8 in Height 1155 mm / 45.5 in | Length: 2139 mm / 84.2 in Width: 929 mm / 36.6 in Height: 1299 mm / 51.1 in (1399 mm / 55.1 in with screen raised)890 | Length 2055 mm / 80.9 in. Width 779 mm / 30.6 in Height 1080 mm / 42.5 in | Width 775 mm / 30.5 in Height 1070 mm / 42.1 in |
| Wheelbase: | 1646 mm / 64.8 in | 1495 mm / 58.8 in | 1491 mm / 58.7 in | 1410 mm / 55.5 in. | 1445 mm / 56.8 in |
| Seat Height: | 685 mm / 27.0 in | 810 mm / 31.9 in | 834 mm / 32.8 in | 790 mm / 31.1 in | 825 mm / 32.4 in |
| Fuel Capacity: | 20 Litres / 5.3 US gal | 14 Litres / 3.7 US gal | 19.5 Litres / 4.6 US gal | 15 Litres / 4.0 US gal | 15.5 Litres / 4.1 US gal / 3.4 Imp gal |