At the heart of the 2009 Keeway ARN 125 scooter motorcycle, Keeway pairs a 124.6 cc (7.6 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 8.3 HP (6.1 kW) at 7,500 rpm while maximum torque reaches 7.8 Nm (5.8 lb-ft) at 6,500 rpm, transferring power to the rear wheel through belt final drive. With a specific output of 66.6 HP per liter and a 1,000 rpm working window between peak torque (6,500 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the ARN 125 measures 105 kg (231 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.65 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,300 mm (51.2 in) wheelbase engineered for quick, flickable steering geometry. The 5-liter (1.3 US gal) fuel tank paired with a rated consumption of 2.6 L/100 km provides an estimated theoretical range of roughly 192 km (119 miles) between fill-ups, while factory top speed is listed at 82 km/h (51 mph).
Within MotoLibrary's Keeway archive, this model family spans 4 indexed model years from 2006 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
66.6 HP/L
Power-to-Weight
0.08 HP/kg (12.65 kg/HP)
Power Band Window
6,500–7,500 rpm
Theoretical Range
~192 km (119 mi)
Engine
Displacement124.6 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power8.3 HP (6.1 kW)) @ 7500 RPM
Torque7.8 Nm (0.8 kgf-m or 5.8 ft.lbs) @ 6500 RPM
Compression9.5:1
Bore x Stroke52.4 x 57.8 mm (2.1 x 2.3 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Cams (OHC)
IgnitionC.D.I.
CoolingAir
Transmission
Final DriveBelt (final drive)
ClutchDry, centrifugal
Performance
Top Speed82.0 km/h (51.0 mph)
Fuel Consumption2.60 litres/100 km (38.5 km/l or 90.47 mpg)
Greenhouse Gases60.3 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
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.
