Classic · 1990

FIST 1340 Heritage Softail

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MotoLibrary Score

50 /100 Balanced

Power

49 HP

Engine

1337 ccm

Technical Overview

1990 Harley-Davidson FIST 1340 Heritage Softail Technical Analysis & Specification Breakdown

At the heart of the 1990 Harley-Davidson FIST 1340 Heritage Softail classic motorcycle, Harley-Davidson pairs a 1337 cc (81.6 cu in) air-cooled v2, four-stroke architecture with road-focused gearing. 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 FIST 1340 Heritage Softail measures 298 kg (657 lbs) wet (curb), translating to a power-to-weight ratio of 0.16 HP/kg (6.08 kg per horsepower). The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Specific Output

36.6 HP/L

Power-to-Weight

0.16 HP/kg (6.08 kg/HP)

Engine

Displacement 1337.0 ccm (81.58 cubic inches)

Engine Type V2, four-stroke

Engine Details V2, four-stroke

Power 49.0 HP (35.8 kW)) @ 5000 RPM

Compression 8.5:1

Bore x Stroke 88.8 x 108.0 mm (3.5 x 4.3 inches)

Valves/Cylinder 2

Fuel Control Overhead Valves (OHV)

Cooling Air

Transmission

Gearbox 5-speed

Final Drive Belt (final drive)

Wheels & Brakes

Front Tyre MT 90-16

Rear Tyre MT 90-16

Front Brakes Single disc

Rear Brakes Single disc

Dimensions & Weight

Weight incl. 298.0 kg (657.0 pounds)

Fuel Capacity 13.00 litres (3.43 US gallons)

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Power

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Fuel Capacity

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Brakes

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Transmission

Transmission and final drive affect maintenance, smoothness and everyday usability.

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Intermediate

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