Model JD

1926 Harley-Davidson Model JD Technical Analysis & Specification Breakdown

Engineered by Harley-Davidson for the allround motorcycle segment, the 1926 Harley-Davidson Model JD utilizes a 1208 cc (73.7 cu in) v2, four-stroke layout. In factory specification, peak output is rated at 12 HP (8.8 kW), transferring power to the rear wheel through chain final drive. With a specific output of 9.9 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 Model JD measures 194 kg (428 lbs) dry, translating to a power-to-weight ratio of 0.06 HP/kg (16.17 kg per horsepower).

Within MotoLibrary's Harley-Davidson archive, this model family spans 7 indexed model years from 1923 to 1929, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.