Built around AJS's sport motorcycle platform, the 2018 AJS Cadwell 125 pairs a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 9.9 HP (7.2 kW) at 9,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 79.8 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 Cadwell 125 measures 113 kg (249 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.41 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 1,330 mm (52.4 in) wheelbase engineered for quick, flickable steering geometry. The 11.2-liter (3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's AJS archive, this model family spans 4 indexed model years from 2018 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
79.8 HP/L
Power-to-Weight
0.09 HP/kg (11.41 kg/HP)
Standover Height
740 mm (29.1 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power9.9 HP (7.2 kW)) @ 9000 RPM
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel SystemInjection
Fuel ControlOverhead Cams (OHC)
IgnitionCoil CDI
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multiplate
Performance
Emission DetailsEuro 4
Chassis
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1330 mm (52.4 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre130/70-17
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight113.0 kg (249.1 pounds)
Power/Weight0.0878 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.
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.
