FXST 1340 Softail

1984 Harley-Davidson FXST 1340 Softail Technical Analysis & Specification Breakdown

Built around Harley-Davidson's custom - cruiser motorcycle platform, the 1984 Harley-Davidson FXST 1340 Softail utilizes a 1337 cc (81.6 cu in) air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 64 HP (46.7 kW) at 5,200 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 47.9 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 FXST 1340 Softail measures 298 kg (657 lbs) wet (curb), translating to a power-to-weight ratio of 0.21 HP/kg (4.66 kg per horsepower). The 19-liter (5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 174 km/h (108 mph).

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.