Positioned in Aeon's scooter motorcycle lineup, the 2025 Aeon CO-IN 125i features a 124.9 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 8.1 HP (5.9 kW) at 6,500 rpm while maximum torque reaches 8.8 Nm (6.5 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a automatic gearbox and chain final drive. With a specific output of 64.9 HP per liter and a 1,000 rpm working window between peak torque (5,500 rpm) and peak power (6,500 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 CO-IN 125i measures 112 kg (247 lbs) dry, translating to a power-to-weight ratio of 0.07 HP/kg (13.83 kg per horsepower). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,210 mm (47.6 in) wheelbase engineered for quick, flickable steering geometry. The 6-liter (1.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Aeon archive, this model family spans 2 indexed model years from 2012 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
64.9 HP/L
Power-to-Weight
0.07 HP/kg (13.83 kg/HP)
Power Band Window
5,500–6,500 rpm
Standover Height
740 mm (29.1 in)
Engine
Displacement124.9 ccm (7.62 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power8.1 HP (5.9 kW)) @ 6500 RPM
Torque8.8 Nm (0.9 kgf-m or 6.5 ft.lbs) @ 5500 RPM
Compression10.8:1
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Fuel SystemInjection
IgnitionC.D.I.
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveChain (final drive)
ClutchCentrifugal clutch
DrivelineCVT
Chassis
Frame TypeSteel tube
Front SuspensionTelescopic fork
Front Travel60 mm (2.4 inches)
Rear SuspensionSingle shock
Rear Travel55 mm (2.2 inches)
Wheelbase1210 mm (47.6 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre120/70-13
Rear Tyre130/70-13
Front BrakesSingle disc
Front Brake Ø155 mm (6.1 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø110 mm (4.3 inches)
Dimensions & Weight
Dry Weight112.0 kg (246.9 pounds)
Power/Weight0.0719 HP/kg
Seat Height740 mm (29.1 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.
