FXSB 1340 Low Rider

1983 Harley-Davidson FXSB 1340 Low Rider Technical Analysis & Specification Breakdown

At the heart of the 1983 Harley-Davidson FXSB 1340 Low Rider classic motorcycle, Harley-Davidson relies on a 1337 cc (81.6 cu in) air-cooled v2, four-stroke powerplant. In factory specification, peak output is rated at 57 HP (41.6 kW) at 5,200 rpm, transferring power to the rear wheel through a 4-speed gearbox and belt final drive. With a specific output of 42.6 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 FXSB 1340 Low Rider measures 289 kg (637 lbs) wet (curb), translating to a power-to-weight ratio of 0.2 HP/kg (5.07 kg per horsepower). The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 155 km/h (96 mph).

Within MotoLibrary's Harley-Davidson archive, this model family spans 4 indexed model years from 1982 to 1985, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.