Engineered by ajs for the allround motorcycle segment, the 1954 ajs 16m pairs a 348 cc (21.2 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 16 HP (11.7 kW) at 5,600 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 46 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the 16m measures 173 kg (381 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.81 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,400 mm (55.1 in) wheelbase engineered for quick, flickable steering geometry.
Specific Output
46 HP/L
Power-to-Weight
0.09 HP/kg (10.81 kg/HP)
Standover Height
810 mm (31.9 in)
Engine
Displacement348.0 ccm (21.23 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power16.0 HP (11.7 kW)) @ 5600 RPM
Fuel SystemCarburettor. Amal
Fuel ControlOverhead Valves (OHV)
CoolingAir
Transmission
Final DriveChain (final drive)
Performance
Top Speed126.0 km/h (78.3 mph)
Chassis
Front SuspensionTeledraulic fork
Rear SuspensionSwinging arm
Wheelbase1400 mm (55.1 inches)
Wheels & Brakes
Front Tyre19-19
Rear Tyre19-19
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight173.0 kg (381.4 pounds)
Power/Weight0.0925 HP/kg
Seat Height810 mm (31.9 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
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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.
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.
