GT650S

2008 Hyosung GT650S Technical Analysis & Specification Breakdown

At the heart of the 2008 Hyosung GT650S sport touring motorcycle, Hyosung utilizes a 674 cc (41.1 cu in) oil & air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 78 HP (56.9 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 115.7 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the GT650S measures 190 kg (419 lbs) dry, translating to a power-to-weight ratio of 0.41 HP/kg (2.44 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,440 mm (56.7 in) wheelbase engineered for balanced agility and highway composure. The 17-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Hyosung archive, this model family spans 2 indexed model years from 2008 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.