Across 9 covered model years from 1983 to 1991, the Harley-Davidson FXST 1340 Softail motorcycle has supplied wet/running weights ranging from 639.3 lb (290 kg) to 657 lb (298 kg) and dry weights ranging from 617.3 lb (280 kg), depending on model year.
Harley-Davidson FXST 1340 Softail weight overview
The scale number is high enough that parking and low-speed balance deserve real consideration. Once the bike leans too far, recovering it takes much more effort than on a light machine.
Very Heavy Motorcycle
How heavy is the Harley-Davidson FXST 1340 Softail?
wet weight
Using a model-level wet weight comparison, the Harley-Davidson FXST 1340 Softail is lighter than about 65.8% of 168 Harley-Davidson custom/cruiser motorcycles with compatible weight data.
Dry vs ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Harley-Davidson FXST 1340 Softail weight & related specs
| Model years covered | 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 |
|---|---|
| Wet / running weight | 639.3 lb (290 kg) to 657 lb (298 kg) |
| Dry weight | 617.3 lb (280 kg) |
| Engine displacement | 1,337 cc |
| Power | 58 hp to 64 hp |
| Fuel capacity | 5.02 US gal (19 L) to 5.28 US gal (20 L) |
| Full-tank fuel weight (estimated) | 31.2 lb (14.2 kg) to 32.8 lb (14.9 kg) |
Weight changes by model year
The 1983 model is used as the baseline where data is available. Only later supplied values that differ are shown below. A year pill does not mean every individual weight field was supplied for that year.
Useful weight calculations
| Horsepower per 100 lb | 9.07 hp / 100 lb to 9.74 hp / 100 lb |
|---|---|
| Pounds per horsepower | 10.27 lb / hp to 11.02 lb / hp |
| Displacement per pound | 2.04 cc / lb to 2.09 cc / lb |
| Weight per 100 cc | 47.8 lb / 100 cc to 49.1 lb / 100 cc |
| Fuel weight as % of bike weight | 4.8% to 5.1% |
| Weight with full tank | 648.5 lb (294.2 kg) |
What the weight numbers tell you
Harley-Davidson FXST 1340 Softail weight FAQ
What is the Harley-Davidson FXST 1340 Softail dry and wet weight?
Across the covered 1983-1991 years, listed wet/running weight is 639.3 lb (290 kg) to 657 lb (298 kg) and listed dry weight is 617.3 lb (280 kg). Check the year-change section because the exact figure can vary by model year.
Is the Harley-Davidson FXST 1340 Softail lighter or heavier than other Harley-Davidson custom/cruiser motorcycles?
It is comparatively light for this Harley-Davidson category. The model lands near the 34th percentile for weight in the compatible dataset.
Which Harley-Davidson FXST 1340 Softail years have different weight specs?
The supplied data shows different weight figures across the 1983-1991 model years. Use the year-specific changes section above for the exact value attached to each changed year.
How much does a full tank add to the Harley-Davidson FXST 1340 Softail?
Based on the supplied 5.02 US gal (19 L) to 5.28 US gal (20 L) tank capacity, the gasoline itself weighs about 31.2 lb (14.2 kg) to 32.8 lb (14.9 kg) when full. This helps explain part of the difference between dry and ready-to-ride mass.
What is the combined Harley-Davidson FXST 1340 Softail and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 819.3 lb (371.6 kg) before riding gear, luggage or a passenger.
What is the Harley-Davidson FXST 1340 Softail power-to-weight ratio?
Available model-year data produces 9.07 hp per 100 lb to 9.74 hp per 100 lb. It shows engine output relative to motorcycle mass rather than just quoting peak horsepower. That places it around the 45th percentile within the compatible Harley-Davidson custom / cruiser power-to-weight comparison.
What does the Harley-Davidson FXST 1340 Softail weigh with a full tank?
Filling the listed tank brings the calculated bike weight to roughly 648.5 lb (294.2 kg). This estimate is most useful when no official wet/running figure is available.
How much weight do fuel and fluids add to the Harley-Davidson FXST 1340 Softail?
Where both figures are available, the listed wet-versus-dry difference is about 22 lb (10 kg). That gap reflects fuel and operating fluids, plus any differences in how the source defines dry and running weight.
How much of the Harley-Davidson FXST 1340 Softail total weight comes from fuel?
The calculated full-tank fuel mass is about 4.8% to 5.1% of the bike’s listed weight. This helps show why a dry-weight number can understate what you actually manage on the road.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Harley-Davidson website.