Triumph Bonneville Bobber Black (2018) vs Vyrus Alyen (2020) vs Kawasaki VN 900 Vulcan Classic (2008-09) vs Kawasaki Z1-A (1974)
Comparison technical specifications
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| Make: | Triumph | Vyrus | Kawasaki | Kawasaki |
| Model: | Bonneville Bobber Black | Alyen | VN 900 Vulcan Classic | Z1-A |
| Years: | 2018 | 2020 | 2008-09 | 1974 |
| Engine: | Four stoke, parallel twin, 270o crank, SOHC | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valve per cylinder | Four stroke V-Twin, SOHC, 4 valve | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. |
| Capacity: | 1198 cc / 73.1 cu in | 1285 cc / 78.4 cub in | 903 cc / 49 cu-in | 903 cc / 55.1 cu-in |
| Bore x Stroke: | 97.6 x 80 mm | 116 x 60.8 mm | 88.0 x 74.2 mm | 66 x 66 mm |
| Compression Ratio: | 10.0:1 | 11.3:1 | 9.5:1 | 8.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Multipoint sequential electronic fuel injection | Electronic Fuel Injection | Fuel injection: ø 34 mm x 2 with dual throttles | 4 x 28mm Mikuni VM28SC |
| Ignition: | Digital | Digital CDI | Digital | Battery and coil |
| Starting: | Electric | Electric | Electric | Electric & kick |
| Max Power: | 57.4 kW / 77 hp @ 6550 rpm | 205 hp / 152.86 kW @ 10,500 rpm | 37 kW / 50 hp @ 5700 rpm | 82 hp / 59.8 kW @ 8500 rpm |
| Max Torque: | 105 Nm / 10.7 kgf-m / 77.4 lb-ft @ 3100 rpm | NA | 78 Nm / 8.0 kg-fm @ 3700 rpm | 73.5 Nm / 54.3 lb-ft @ 7000 rpm |
| Clutch: | Wet, multi-plate | Wet multiplate clutch | Wet multi-disc, manual | Wet, multi-plate |
| Transmission: | 6-Speed | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain, X-ring | Chain | Belt | Chain |
| Frame: | Dual tubular steel cradle | Vyrus Magnesium double omega design combined with a self supporting composite body | Double-cradle, steel | Double tubular steel cradle |
| Front Suspension: | 47mm non-adj Showa fork | Push Rod Twin Pivot Vyrus | 41mm telescopic fork with 7-way preload | 36mm Telescopic forks |
| Rear Suspension: | Kayaba twin shocks with adjustable preload | Push Rod Twin Pivot Vyrus | Uni-Trak with 7-way adjustable preload | Dual shock, 5-way preload adjustment |
| Front Brakes: | 2x 310 mm Disc, 2 piston Brembo calipers, ABS | 2 x Disks, Brembo GP4 series | Single 300mm disc 2 piston caliper | Single 296mm disc 2 piston caliper |
| Rear Brakes: | Single 255 mm disc, 2 piston caliper, ABS | Single disk, Brembo GP4 series | Single 270mm disc 2 piston caliper | 200mm drum |
| Front Tyre: | 130/90-16 | 120/70 ZR 17 | 130/90 -16 | 3.25 H19 |
| Rear Tyre: | 150/80-16 | 200/90 ZR17 | 180/70 -15 | 4.00 S18 |
| Trail: | 87.0 mm / 3.4 in | 84 mm to 112 mm / 3.3 in to 4.4 in | 160 mm / 6.3 in | 3.75 in. |
| Wheelbase: | 1510 mm / 59.4 in | 1575 mm / 62 in | 1645 mm / 64.8 in | 1498.6 mm / 59.0 in |
| Fuel Capacity: | 9.1 Litres / 2.4 US gal | 11 Litres / 2.9 US gal | 20 Litres / 5.3 US gal. | 18 Litres / 4.7 gal |