G-12

1962 Matchless G-12 Technical Analysis & Specification Breakdown

Built around Matchless's sport motorcycle platform, the 1962 Matchless G-12 pairs a 646 cc (39.4 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 35 HP (25.5 kW) at 6,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 54.2 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 G-12 measures 180 kg (397 lbs) dry, translating to a power-to-weight ratio of 0.19 HP/kg (5.14 kg per horsepower).

Within MotoLibrary's Matchless archive, this model family spans 8 indexed model years from 1958 to 1965, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.