Yamaha XZ 550 Vision (1982-83) vs Norton Commando 961 Café Racer MIII "Mick Grant Special" Limited Edition (2016) vs Suzuki RG 400 (1985-86)
Comparison technical specifications
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| Make: | Yamaha | Norton | Suzuki |
| Model: | XZ 550 Vision | Commando 961 Café Racer MIII "Mick Grant Special" Limited Edition | RG 400 |
| Years: | 1982-83 | 2016 | 1985-86 |
| Engine: | Four stroke, 70°V-twin cylinder. DOHC, 4 valve per cylinder | Four stroke, parallel twin with push-rod valve actuation, 3 bearing crank balancer shaft, 2 valves per cylinder | Two stroke, square four cylinder, rotary valve with exhaust port valves |
| Capacity: | 552 cc / 33.7 lb-ft | 961 cc / 58.6 cu in | 397 cc / 24.2 cu in |
| Bore x Stroke: | 80 х 55 mm | 88 x 79 mm | 50 x 50.6 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 10.4:1 | 10.1:1 | 7.0:1 |
| Induction: | 2x 36mm Mikuni carburetors | Fuel injected | 4 x 28 mm Mikuni VM28SH Flatslide carburetors |
| Ignition: | Battery powered inductive | Crank fired electronic | Suzuki PEI |
| Starting: | Electric | Electric | Kick |
| Max Power: | 64 hp / 46.7 kW @ 9500 rpm | 59.7 kW / 80 hp @ 6500 rpm | 43.1 kW / 59 hp @ 9000 rpm |
| Max Torque: | 4.8 kgf-m / 34.7 lb-ft @ 8500 rpm | 90 Nm / 9.2 kgf-m / 65 ft-lb @ 5200 rpm | 48 Nm / 4.9 kgf-m / 35.4 lb-ft @ 8500 rpm |
| Transmission: | 5 Speed | 5 Speed, constant mesh | 6 Speed |
| Final Drive: | Shaft | Chain, 525 "O" ring | Chain |
| Front Suspension: | Telescopic oil damped forks | Ø43 mm Öhlins RSU, adjustable preload, compression, and rebound damping. | Air adjustable fork with 38mm tubes, adjustable spring preload and anti dive valuing. |
| Rear Suspension: | Gas filled monoshock, 2-way adjustable. | Öhlins reservoir-style twin shocks, adjustable ride height, preload, compression, and rebound damping. | Full floating system, shock absorber, adjustable for spring preload |
| Front Brakes: | 2x 266mm discs | Brembo 2 x Ø320 mm semi-floating carbon stainless steel discs, 4 piston "Gold Line" axial calipers | 2 x 260 mm Discs, 4-piston calipers |
| Rear Brakes: | Single 177mm drum | Brembo single Ø220 mm disc, 2 piston "Gold Line"caliper | Single 210 mm disc, 2-piston caliper |
| Front Tyre: | 100/90-18 | 120/70 -17 | 110/90 V16 |
| Rear Tyre: | 110/90-18 | 180/55 -17 | 120/90 V17 |
| Dry Weight: | 188 kg / 414.4 lbs | 188 kg / 414 lbs | 154 kg / 340 lbs |
| Fuel Capacity: | 17 Litres / 4.4 US gal | 17 Litres / 4.5 US gal | 22 Litres / 5.8 US gal / 4.8 Imp gal |