For the 2017 model year, the Harley-Davidson Softail Fat Boy S motorcycle has a supplied wet/running weight of 734.1 lb (333 kg) and a dry weight of 705.5 lb (320 kg).
Harley-Davidson Softail Fat Boy S 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 Softail Fat Boy S?
wet weight
Using a model-level wet weight comparison, the Harley-Davidson Softail Fat Boy S is heavier than about 73.6% of 108 Harley-Davidson 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 Softail Fat Boy S weight & related specs
| Model years covered | 2017 |
|---|---|
| Wet / running weight | 734.1 lb (333 kg) |
| Dry weight | 705.5 lb (320 kg) |
| Engine displacement | 1,801 cc |
| Torque | 107.7 lb-ft (146 Nm) |
| Fuel capacity | 4.99 US gal (18.9 L) |
| Full-tank fuel weight (estimated) | 31 lb (14.1 kg) |
Useful weight calculations
| Torque per 100 lb | 14.67 lb-ft / 100 lb |
|---|---|
| Displacement per pound | 2.45 cc / lb |
| Weight per 100 cc | 40.8 lb / 100 cc |
| Fuel weight as % of bike weight | 4.2% |
| Weight with full tank | 736.5 lb (334.1 kg) |
What the weight numbers tell you
Harley-Davidson Softail Fat Boy S weight FAQ
What is the Harley-Davidson Softail Fat Boy S dry and wet weight?
Across the covered 2017 years, listed wet/running weight is 734.1 lb (333 kg) and listed dry weight is 705.5 lb (320 kg). Check the year-change section because the exact figure can vary by model year.
Is the Harley-Davidson Softail Fat Boy S lighter or heavier than other Harley-Davidson motorcycles?
Compared with similar Harley-Davidsons in this dataset, it is heavier than about 73.6% of 108 motorcycles using the same weight basis.
How much does a full tank add to the Harley-Davidson Softail Fat Boy S?
Based on the supplied 4.99 US gal (18.9 L) tank capacity, the gasoline itself weighs about 31 lb (14.1 kg) when full. This helps explain part of the difference between dry and ready-to-ride mass.
What is the combined Harley-Davidson Softail Fat Boy S and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 914.1 lb (414.6 kg) before riding gear, luggage or a passenger.
How heavy is the Harley-Davidson Softail Fat Boy S after filling the fuel tank?
Based on the available dry-weight and tank-capacity data, a full-tank estimate is 736.5 lb (334.1 kg). Oil, coolant and market-specific equipment can still make actual ready-to-ride weight different.
How much torque does the Harley-Davidson Softail Fat Boy S have per 100 lb?
Where compatible torque and weight figures are available, the model works out to 14.67 lb-ft per 100 lb. This gives more context than torque alone because it relates engine twist to the mass it has to move.
What is the Harley-Davidson Softail Fat Boy S displacement per pound?
The available figures work out to 2.45 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
What is the Harley-Davidson Softail Fat Boy S weight difference versus the category median?
Compared with the median Harley-Davidson motorcycle weight of 672.4 lb (305 kg), the model is roughly 61.7 lb (28 kg) heavier.
Where will I notice the Harley-Davidson Softail Fat Boy S weight most?
The main challenge is low-speed and stationary handling. Once moving the chassis may disguise the mass, but backing up or holding it on a slope still means managing the full weight.
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.