At the heart of the 2011 Hyosung Rapier 450 Quad atv motorcycle, Hyosung 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) at 8,500 rpm while maximum torque reaches 47.6 Nm (35.1 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 111.4 HP per liter and a 1,500 rpm working window between peak torque (7,000 rpm) and peak power (8,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
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 Band Window
7,000–8,500 rpm
Engine
Displacement448.8 ccm (27.39 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power50.0 HP (36.5 kW)) @ 8500 RPM
Torque47.6 Nm (4.9 kgf-m or 35.1 ft.lbs) @ 7000 RPM
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.
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.
