Built around ajs's allround motorcycle platform, the 2015 ajs eco 2 125 pairs a 124 cc (7.6 cu in) balance shaft architecture with road-focused gearing. In factory specification, peak output is rated at 10.1 HP (7.3 kW) at 8,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81.1 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the eco 2 125 measures 114 kg (251 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.33 kg per horsepower). Rider ergonomics and chassis geometry center around a 760 mm (29.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1 mm (0 in) wheelbase engineered for quick, flickable steering geometry. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 100 km/h (62 mph).
Specific Output
81.1 HP/L
Power-to-Weight
0.09 HP/kg (11.33 kg/HP)
Standover Height
760 mm (29.9 in)
Engine
Displacement124.00 ccm (7.57 cubic inches)
Engine TypeBalance shaft
Engine DetailsSingle cylinder, four-stroke
Power10.06 HP (7.3 kW)) @ 8000 RPM
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Cams (OHC)
IgnitionCoil CDI
Transmission
Gearbox5-speed
Final DriveChain
Performance
Top Speed100.0 km/h (62.1 mph)
Chassis
Front SuspensionUSD telefork
Rear SuspensionPro Shock linked.
Wheelbase1,400 mm (55.1 inches)
Wheels & Brakes
Front Tyre3.00-21
Rear Tyre4.10-18
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight114.0 kg (251.3 pounds)
Power/Weight0.0882 HP/kg
Seat Height760 mm (29.9 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.
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.
