Model 14 250

1961 AJS Model 14 250 Technical Analysis & Specification Breakdown

At the heart of the 1961 AJS Model 14 250 sport motorcycle, AJS pairs a 248 cc (15.1 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 17 HP (12.4 kW) at 7,250 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 68.5 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 Model 14 250 measures 149 kg (328 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (8.76 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 1,345 mm (53 in) wheelbase engineered for quick, flickable steering geometry. The 12.5-liter (3.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's AJS archive, this model family spans 6 indexed model years from 1960 to 1965, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.