Manx

1958 Norton Manx Technical Analysis & Specification Breakdown

At the heart of the 1958 Norton Manx sport motorcycle, Norton features a 499 cc (30.5 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 47 HP (34.3 kW) at 6,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 94.2 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 Manx measures 140 kg (309 lbs) dry, translating to a power-to-weight ratio of 0.34 HP/kg (2.98 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,400 mm (55.1 in) wheelbase engineered for quick, flickable steering geometry.

Within MotoLibrary's Norton archive, this model family spans 9 indexed model years from 1954 to 1962, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.