FXST 1340 Softail

1990 Harley-Davidson FXST 1340 Softail Technical Analysis & Specification Breakdown

Built around Harley-Davidson's custom - cruiser motorcycle platform, the 1990 Harley-Davidson FXST 1340 Softail relies on a 1337 cc (81.6 cu in) air-cooled v2, four-stroke powerplant. In factory specification, peak output is rated at 49 HP (35.8 kW) at 5,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 36.6 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 FXST 1340 Softail measures 290 kg (639 lbs) wet (curb), translating to a power-to-weight ratio of 0.17 HP/kg (5.92 kg per horsepower). The 20-liter (5.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Harley-Davidson archive, this model family spans 9 indexed model years from 1983 to 1991, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.