Hyosung GV 125 Aquila (1998-06) vs Yamaha XT 660X (2010) vs Yamaha SRX 250 (1987-90) vs Harley-Davidson Harley Davidson XG 750 Street (2020)
Comparison technical specifications
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| Make: | Hyosung | Yamaha | Yamaha | Harley-Davidson |
| Model: | GV 125 Aquila | XT 660X | SRX 250 | Harley Davidson XG 750 Street |
| Years: | 1998-06 | 2010 | 1987-90 | 2020 |
| Engine: | Four stroke, 75°V twin, DOHC, 4 valve per cylinder | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, single cylinder, DOHC, 4 valves | Four stroke, Revolution X™ 60° V-Twin, SOHC, 4 valves per cylinder. |
| Capacity: | 124 cc / 7.6 cu-in | 659 cc/ 40.2 cu-in | 249 cc / 15.2 cu-in | 749 cc / 46 cub in. |
| Bore x Stroke: | 44.0 x 41.0 mm | 100 x 84 mm | 73 х 59.6 mm | 85 x 66 mm |
| Cooling System: | Air/oil cooled | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 11.2:1 | 10: 1 | 10.0:1 | 11.0:1 |
| Induction: | 2x 26mm Mikuni BDS carburetor | Fuel injection, 44 mm throttle body | Y22PV Teikei carburetor | Mikuni Single Port Fuel Injection, 38 mm bore |
| Ignition: | CDI | TCI | TCI | Electronic |
| Starting: | Electric | Electric | Electric | Electric |
| Max Torque: | 9.7 Nm / 7.2 lb-ft @ 10000 rpm | 58.4 Nm / 5.7 kgf-m @ 5250 rpm | 2.4 kgf-m / 17.3 lb-ft @ 8500 rpm | 59 Nm / 6.0 kgf-m / 43.5 ft/lb @ 4000 rpm |
| Transmission: | S peed | 5 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Belt |
| Front Suspension: | Telescopic forks | 43 mm Telescopic forks, | Centre axle 33mm forks | Non-adjustable 37mm forks |
| Front Wheel Travel: | 120 mm / 4.7 in | 225 mm / 8.8 in | 140 mm / 5.9 in | 140 mm / / 5.5 in |
| Rear Suspension: | Swinging arm | Oscillating arm standard Monocross. | Single shock, adjustable spring preload | Spring-preload adjustable dual shocks |
| Rear Wheel Travel: | 80 mm / 3.1 in | 200 mm / 7.9 in | 100 mm / 3.9 in | 94 mm / 3.5 in |
| Front Brakes: | Single 280mm disc | Single 320mm disc 4 piston caliper | Single disc 2 piston caliper | Single disc, 2 piston caliper |
| Rear Brakes: | 130mm Drum | Single 245mm disc 1 piston caliper | Drum | Single disc, 2 piston caliper |
| Front Tyre: | 110/90 -16 | 120/700-17 | 90/90-16 | 100/80 R17 |
| Rear Tyre: | 130/90 -15 | 160/60-17 | 100/90-18 | 140/75 R15 |
| Seat Height: | 665 mm / 26.2 in | 875mm / 34.4 in | 780 mm / 30.7 in | 720 mm / 25.7 in |
| Dry Weight: | 138 kg | 173 kg / 318.4 lbs | 123 kg / 371 lbs | 223 kg / 492 lbs |
| Fuel Capacity: | 14 Litres / 3.7 US gal | 15 Litres / 3.9 gal | 9 Litres / 2.3 US gal | 13.1 Litres / 3.5 US gal |