Engineered by AJS for the sport motorcycle segment, the 2024 AJS Bilston 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 11.4 HP (8.3 kW) at 9,000 rpm while maximum torque reaches 9.5 Nm (7 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 91.9 HP per liter and a 2,500 rpm working window between peak torque (6,500 rpm) and peak power (9,000 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 Bilston 125 measures 132 kg (291 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (11.58 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 1,340 mm (52.8 in) wheelbase engineered for quick, flickable steering geometry. The 19-liter (5 US gal) fuel tank paired with a rated consumption of 1.84 L/100 km provides an estimated theoretical range of roughly 1033 km (642 miles) between fill-ups, while factory top speed is listed at 97 km/h (60 mph).
Specific Output
91.9 HP/L
Power-to-Weight
0.09 HP/kg (11.58 kg/HP)
Power Band Window
6,500–9,000 rpm
Theoretical Range
~1033 km (642 mi)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power11.4 HP (8.3 kW)) @ 9000 RPM
Torque9.5 Nm (1.0 kgf-m or 7.0 ft.lbs) @ 6500 RPM
Compression11.2:1
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
Top Speed96.6 km/h (60.0 mph)
Fuel Consumption1.84 litres/100 km (54.3 km/l or 127.84 mpg)
Greenhouse Gases42.7 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 5
ExhaustStainless steel
Chassis
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1340 mm (52.8 inches)
Wheels & Brakes
Front Tyre90/90-17
Rear Tyre130/80-17
Front BrakesDouble disc. Combined braking system
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Ø210 mm (8.3 inches)
Dimensions & Weight
Weight incl.132.0 kg (291.0 pounds)
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.
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.
