Built around Ajs's scooter motorcycle platform, the 2021 Ajs Modena 125 pairs a 125 cc (7.6 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 7.1 HP (5.2 kW) at 7,500 rpm while maximum torque reaches 7.5 Nm (5.5 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 56.8 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 prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Modena 125 measures 95 kg (209 lbs) dry, translating to a power-to-weight ratio of 0.07 HP/kg (13.38 kg per horsepower). Rider ergonomics and chassis geometry center around a 735 mm (28.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,360 mm (53.5 in) wheelbase engineered for quick, flickable steering geometry. The 4.6-liter (1.2 US gal) fuel tank paired with a rated consumption of 2.8 L/100 km provides an estimated theoretical range of roughly 164 km (102 miles) between fill-ups, while factory top speed is listed at 89 km/h (55 mph).
Within MotoLibrary's Ajs archive, this model family spans 4 indexed model years from 2014 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
56.8 HP/L
Power-to-Weight
0.07 HP/kg (13.38 kg/HP)
Power Band Window
6,500–7,500 rpm
Theoretical Range
~164 km (102 mi)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power7.1 HP (5.2 kW)) @ 7500 RPM
Torque7.5 Nm (0.8 kgf-m or 5.5 ft.lbs) @ 6500 RPM
Compression9.2:1
Bore x Stroke52.4 x 57.8 mm (2.1 x 2.3 inches)
Fuel SystemCarburettor. Delphi
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchCoil CDI
DrivelineAutomatic Twist and Go
Performance
Top Speed88.5 km/h (55.0 mph)
Fuel Consumption2.80 litres/100 km (35.7 km/l or 84.01 mpg)
Greenhouse Gases65.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 4
Chassis
Frame TypeSteel
Front SuspensionTelescopic fork
Rear SuspensionSwing arm
Wheelbase1360 mm (53.5 inches)
Wheels & Brakes
Front Tyre3.50-10
Rear Tyre3.50-10
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight95.0 kg (209.4 pounds)
Power/Weight0.0748 HP/kg
Seat Height735 mm (28.9 inches) If adjustable, lowest setting.
Overall Height1090 mm (42.9 inches)
Overall Length1885 mm (74.2 inches)
Overall Width770 mm (30.3 inches)
Fuel Capacity4.60 litres (1.22 US gallons)
Other
StarterElectric & kick
Color OptionsBlack/White, Red/White, Blue/White, Black, White, Blue, Grey, Orange
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.
