Engineered by Hyosung for the sport motorcycle segment, the 2012 Hyosung GT125 features a 125 cc (7.6 cu in) oil & air-cooled v2, four-stroke configuration. In factory specification, peak output is rated at 14.2 HP (10.4 kW) at 10,500 rpm while maximum torque reaches 10.2 Nm (7.5 lb-ft) at 9,750 rpm, transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 113.6 HP per liter and a 750 rpm working window between peak torque (9,750 rpm) and peak power (10,500 rpm), 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 GT125 measures 166 kg (366 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.69 kg per horsepower). Rider ergonomics and chassis geometry center around a 795 mm (31.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,445 mm (56.9 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, while factory top speed is listed at 110 km/h (68 mph).
Within MotoLibrary's Hyosung archive, this model family spans 4 indexed model years from 2008 to 2013, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
113.6 HP/L
Power-to-Weight
0.09 HP/kg (11.69 kg/HP)
Power Band Window
9,750–10,500 rpm
Standover Height
795 mm (31.3 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Power14.2 HP (10.4 kW)) @ 10500 RPM
Torque10.2 Nm (1.0 kgf-m or 7.5 ft.lbs) @ 9750 RPM
Compression11.3:1
Bore x Stroke44.0 x 41.0 mm (1.7 x 1.6 inches)
Valves/Cylinder4
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionC.D.I
LubricationWet sump
CoolingOil & air
Transmission
Gearbox5-speed
Performance
Top Speed110.0 km/h (68.4 mph)
Chassis
Front SuspensionTelescopic fork
Rear SuspensionSwing arm with Hyeraulic Double shock absorber
Wheelbase1445 mm (56.9 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre150/70-17
Front BrakesSingle disc
Rear BrakesSingle disc
WheelsBlack, 6-spoke
Dimensions & Weight
Dry Weight166.0 kg (366.0 pounds)
Power/Weight0.0855 HP/kg
Seat Height795 mm (31.3 inches) If adjustable, lowest setting.
Overall Height1120 mm (44.1 inches)
Overall Length2080 mm (81.9 inches)
Overall Width760 mm (29.9 inches)
Fuel Capacity17.00 litres (4.49 US gallons)
Reserve Fuel2.50 litres (0.66 US gallons)
Other
StarterElectric
Color OptionsBlack, white
WarrantyTwo year warranty. One year roadside assistance
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
