KJ Streamline

1931 Henderson KJ Streamline Technical Analysis & Specification Breakdown

Positioned in Henderson's allround motorcycle lineup, the 1931 Henderson KJ Streamline utilizes a 1301 cc (79.4 cu in) in-line four, four-stroke layout. In factory specification, peak output is rated at 40 HP (29.2 kW) at 4,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 30.7 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

Within MotoLibrary's Henderson archive, this model family spans 3 indexed model years from 1929 to 1931, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.