Engineered by Hyosung for the atv motorcycle segment, the 2009 Hyosung Rapier 450 Quad utilizes a 448.8 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 50 HP (36.5 kW), transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 111.4 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 Rapier 450 Quad measures 165 kg (364 lbs) dry, translating to a power-to-weight ratio of 0.3 HP/kg (3.3 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,250 mm (49.2 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 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 2009 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
111.4 HP/L
Power-to-Weight
0.3 HP/kg (3.3 kg/HP)
Engine
Displacement448.8 ccm (27.39 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power50.0 HP (36.5 kW))
Valves/Cylinder4
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox5-speed
Chassis
Wheelbase1250 mm (49.2 inches)
Ground Clearance260 mm (10.2 inches)
Wheels & Brakes
Front Tyre175/75-10
Rear Tyre255/55-9
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight165.0 kg (363.8 pounds)
Power/Weight0.3030 HP/kg
Overall Height1155 mm (45.5 inches)
Overall Length1835 mm (72.2 inches)
Overall Width1170 mm (46.1 inches)
Fuel Capacity11.00 litres (2.91 US gallons)
Other
StarterElectric
Color OptionsRed, black
Notes
A 19 HP version for road use available. 5-speed and reverse.
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
