Hyosung GV 125 Aquila (1998-06) vs Yamaha SR 400 35th Anniversary Edition (2013) vs BMW R 80RT (1981) vs Harley-Davidson Harley Davidson XLH 1000 Sportster 75 Anniversary (1978)
Comparison technical specifications
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| Make: | Hyosung | Yamaha | BMW | Harley-Davidson |
| Model: | GV 125 Aquila | SR 400 35th Anniversary Edition | R 80RT | Harley Davidson XLH 1000 Sportster 75 Anniversary |
| Years: | 1998-06 | 2013 | 1981 | 1978 |
| Engine: | Four stroke, 75°V twin, DOHC, 4 valve per cylinder | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. |
| Capacity: | 124 cc / 7.6 cu-in | 399 cc / 24.3 cu-in | 797.5 cc / 48.7 cu in. | 997 cc / 60.8 cu-in |
| Bore x Stroke: | 44.0 x 41.0 mm | 87 х 67.2 mm | 84.8 x 70.6 mm | 81.0 x 96.8 mm |
| Cooling System: | Air/oil cooled | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 11.2:1 | 8.5:1 | 9.2:1 | 9.0:1 |
| Induction: | 2x 26mm Mikuni BDS carburetor | Fuel injection | 2 x Bing constant depression carburetors | Single 34mm Keihin carburetor |
| Ignition: | CDI | TCI | Battery ignition | Electronic |
| Starting: | Electric | Kick | Electric | Electric |
| Max Power: | 14.2 hp / 10.7 kW @ 10300 rpm | 27 hp / 17.1 KW @ 7000 rpm | 36.4 kW / 50 hp @ 6500 rpm | 57 hp / 41.6 kW @ 5800 rpm |
| Max Torque: | 9.7 Nm / 7.2 lb-ft @ 10000 rpm | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 58 Nm / 5.9 kgf-m / 42 ft/lb @ 4000 rpm | NA |
| Transmission: | S peed | 5 Speed | 5 Speed | 4 Speed |
| Final Drive: | Chain | Chain | Shaft | Chain |
| Front Suspension: | Telescopic forks | Telescopic fork | Telescopic hydraulic fork | Telehydraulic forks |
| Rear Suspension: | Swinging arm | Dual shocks | BMW Monolever swinging arm | Dual shocks swinging arm fork |
| Front Brakes: | Single 280mm disc | Single disc | Single ∅285mm disc, 1 piston caliper | Single 285mm disc |
| Rear Brakes: | 130mm Drum | Drum | ∅200mm Drum | Drum |
| Front Tyre: | 110/90 -16 | 3.50-19 | 100/90-H19 | 3.75-19 |
| Rear Tyre: | 130/90 -15 | 4.00-16 | 120/90-H18 | 4.25-18 |
| Fuel Capacity: | 14 Litres / 3.7 US gal | 12 Litres / 3.2 gal | 19 Litres / 5.0 US gal | 7.5 Litres / 1.8 US gal |