The Hyosung GT 650S is a motorcycle produced from 2004 to 2006. It featured a four-stroke, 90-degree V-twin engine with a capacity of 647cc and 4 valves per cylinder. The engine was liquid-cooled, had a compression ratio of 11.4:1, and used wet-sump lubrication with semi-synthetic 10W/40 oil. Carburetion was handled by a 38mm carburetor, and ignition was digital CDI using an NGK CR8E spark plug. The electric starter produced a maximum power output of 76.4 hp at 9000 rpm and maximum torque of 68 Nm at 7500 rpm. The 6-speed transmission received power via a chain final drive. The steel, double-pipe frame had a length of 2060 mm, width of 740 mm, and height of 1125 mm, with a wheelbase of 1435 mm and a seat height of 780 mm. The dry weight of the motorcycle was 195 kg and the fuel capacity was 17 liters. The front suspension had 41mm oil upside-down forks with a travel of 120 mm, while the swinging arm rear suspension had a travel of 100 mm. The front brakes consisted of twin 300mm discs, with a single 230mm disc on the rear. The motorcycle had a top speed of 203.8 km/h and could complete a standing 1/4 mile in 13.0 seconds.
Technical specifications:
Make Model: Hyosung GT 650S
| Year | 2004 – 06 |
|---|---|
| Engine | Four stroke, 90 degrees V twin, DOHC, 4 valve per cylinder |
| Capacity | 647 cc / 39.4 cu-in |
| Bore x Stroke | 81.5 x 62 mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 11.4:1 |
| Lubrication | Wet sump |
| Engine Oil | Semi-Synthetic, 10W/40 |
| Induction | 38 mm Carburettor |
| Ignition | Digital CDI |
| Spark Plug | NGK, CR8E |
| Starting | Electric |
| Max Power | 76.4 hp / 58.8 kW @ 9000 rpm |
| Max Torque | 68 Nm / 6.93 kg-m @ 7500 rpm |
| Clutch | Wet, multiple discs, cable operated |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Frame | Steel, double pipe |
| Front Suspension | 41mm Oil upside down forks |
| Front Wheel Travel | 120 mm / 4.7 in |
| Rear Suspension | Swinging arm |
| Rear Wheel Travel | 100 mm / 3.9 in |
| Front Brakes | 2x 300mm discs |
| Rear Brakes | Single 230mm disc |
| Front Tyre | 120/60 -17 |
| Rear Tyre | 160/60 -17 |
| Dimensions | Length 2060 mm / 81.1 in Width 740 mm / 29.1 in Height 1125 mm / 44.2 in |
| Wheelbase | 1435 mm / 56.4 in |
| Seat Height | 780 mm / 30.7 in |
| Dry Weight | 195 kg / 429 lbs |
| Wet Weight | 210 kg / 462 lbs |
| Fuel Capacity | 17 Litres / 3.1 US gal |
| Standing 1/4 Mile | 13.0 sec |
| Top Speed | 203.8 km/h |
