Engineered by Buell for the sport motorcycle segment, the 2009 Buell 1125R pairs a 1125.9 cc (68.7 cu in) liquid-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 146 HP (106.6 kW) at 9,800 rpm while maximum torque reaches 111.2 Nm (82 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 129.7 HP per liter and a 1,800 rpm working window between peak torque (8,000 rpm) and peak power (9,800 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 1,387 mm (54.6 in) wheelbase engineered for quick, flickable steering geometry. The 20.06-liter (5.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Buell archive, this model family spans 3 indexed model years from 2008 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
129.7 HP/L
Power Band Window
8,000–9,800 rpm
Engine
Displacement1125.9 ccm (68.70 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Power146.0 HP (106.6 kW)) @ 9800 RPM
Torque111.2 Nm (11.3 kgf-m or 82.0 ft.lbs) @ 8000 RPM
Compression12.3:1
Bore x Stroke103.0 x 67.5 mm (4.1 x 2.7 inches)
Valves/Cylinder4
Fuel SystemInjection. Dual 61 mm down draft throttle bodies, DDFI III fuel injection
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.
