Positioned in Keeway's sport motorcycle lineup, the 2013 Keeway Arsen 125 features a 124.1 cc (7.6 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 10.1 HP (7.3 kW) at 8,500 rpm while maximum torque reaches 8.5 Nm (6.3 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81.4 HP per liter and a 1,000 rpm working window between peak torque (7,500 rpm) and peak power (8,500 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 Arsen 125 measures 115 kg (254 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.39 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,285 mm (50.6 in) wheelbase engineered for quick, flickable steering geometry. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Keeway archive, this model family spans 2 indexed model years from 2013 to 2014, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
81.4 HP/L
Power-to-Weight
0.09 HP/kg (11.39 kg/HP)
Power Band Window
7,500–8,500 rpm
Standover Height
780 mm (30.7 in)
Engine
Displacement124.1 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power10.1 HP (7.3 kW)) @ 8500 RPM
Torque8.5 Nm (0.9 kgf-m or 6.3 ft.lbs) @ 7500 RPM
Compression9.0:1
Bore x Stroke56.5 x 49.5 mm (2.2 x 1.9 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Valves (OHV)
IgnitionCDI
LubricationPressure splash lubrication
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multiple-plate
Chassis
Frame TypeBassinet type
Front SuspensionTelescopic forks
Front Travel110 mm (4.3 inches)
Rear SuspensionTelescopic coil spring oil damped
Rear Travel80 mm (3.1 inches)
Wheelbase1285 mm (50.6 inches)
Ground Clearance165 mm (6.5 inches)
Wheels & Brakes
Front Tyre2.75-18
Rear Tyre3.00-18
Front BrakesSingle disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø130 mm (5.1 inches)
Dimensions & Weight
Dry Weight115.0 kg (253.5 pounds)
Power/Weight0.0875 HP/kg
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
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.
