Positioned in AJS's trial motorcycle lineup, the 2011 AJS JSM Trail 125 pairs a 124 cc (7.6 cu in) single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 10.1 HP (7.3 kW), transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81.5 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 JSM Trail 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 760 mm (29.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,400 mm (55.1 in) wheelbase engineered for quick, flickable steering geometry. The 8.5-liter (2.2 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 100 km/h (62 mph).
Within MotoLibrary's AJS archive, this model family spans 2 indexed model years from 2010 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
81.5 HP/L
Power-to-Weight
0.09 HP/kg (11.39 kg/HP)
Standover Height
760 mm (29.9 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power10.1 HP (7.3 kW))
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor
Fuel ControlOverhead Cams (OHC)
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Performance
Top Speed100.0 km/h (62.1 mph)
Chassis
Front SuspensionUSD telefork
Rear SuspensionPro Shock linked.
Wheelbase1400 mm (55.1 inches)
Wheels & Brakes
Front Tyre3.00-21
Rear Tyre4.10-18
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight115.0 kg (253.5 pounds)
Power/Weight0.0875 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.
