For the 2005 model year, the Harley-Davidson FLSTFI Softail Fat Boy motorcycle has a listed dry weight of 676.8 lb (307 kg).
Harley-Davidson FLSTFI Softail Fat Boy weight overview
This sits in heavyweight territory. Riders should think about garage movement, backing up, surface slope and passenger/luggage load as much as the on-road feel. The comparison uses dry weight because a usable wet/running figure was not supplied, so the actual ready-to-ride motorcycle will be heavier.
Very Heavy Motorcycle
How heavy is the Harley-Davidson FLSTFI Softail Fat Boy?
dry weight
Using a model-level dry weight comparison, the Harley-Davidson FLSTFI Softail Fat Boy is heavier than about 52.2% of 45 Harley-Davidson motorcycles with compatible weight data.
Dry weight
Bike + rider total weight
These totals use the model’s representative dry weight. They exclude riding gear, luggage and a passenger.
Harley-Davidson FLSTFI Softail Fat Boy weight & related specs
| Model years covered | 2005 |
|---|---|
| Dry weight | 676.8 lb (307 kg) |
| Engine displacement | 1,449 cc |
| Torque | 74.5 lb-ft (101 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 | 11.01 lb-ft / 100 lb |
|---|---|
| Displacement per pound | 2.14 cc / lb |
| Weight per 100 cc | 46.7 lb / 100 cc |
| Fuel weight as % of bike weight | 4.6% |
| Weight with full tank | 707.9 lb (321.1 kg) |
What the weight numbers tell you
Harley-Davidson FLSTFI Softail Fat Boy weight FAQ
How heavy is the Harley-Davidson FLSTFI Softail Fat Boy?
Listed dry weight is 676.8 lb (307 kg). Because no usable wet/running figure was supplied, treat that as a lower starting point rather than the exact on-road weight.
Is the Harley-Davidson FLSTFI Softail Fat Boy heavy compared with other Harley-Davidson motorcycles?
It sits fairly close to the middle of the category. Its representative dry weight is around the 52nd percentile among 45 compatible Harley-Davidson motorcycles.
How much does the Harley-Davidson FLSTFI Softail Fat Boy fuel weigh?
The listed tank capacity is 4.99 US gal (18.9 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 31 lb (14.1 kg). That is an estimate for fuel mass, not an official Harley-Davidson curb-weight calculation.
How heavy is the Harley-Davidson FLSTFI Softail Fat Boy with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 856.8 lb (388.6 kg) using the representative dry figure. Gear and luggage would add more.
Can I treat the Harley-Davidson FLSTFI Softail Fat Boy dry weight as curb weight?
No. The usable figure is dry weight, so it excludes at least some operating fluids. Dry weight plus the estimated full fuel load is about 707.9 lb (321.1 kg), and oil/coolant or definition differences may add more.
What is the Harley-Davidson FLSTFI Softail Fat Boy full-tank weight estimate?
Filling the listed tank brings the calculated bike weight to roughly 707.9 lb (321.1 kg). This estimate is most useful when no official wet/running figure is available.
How much of the Harley-Davidson FLSTFI Softail Fat Boy total weight comes from fuel?
Based on the available weight basis, a full tank of gasoline represents about 4.6% of the motorcycle’s weight.
How does Harley-Davidson FLSTFI Softail Fat Boy torque compare with its weight?
The calculated torque-to-weight range is 11.01 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
What is the Harley-Davidson FLSTFI Softail Fat Boy engine-size-to-weight ratio?
Engine displacement relative to bike weight is 2.14 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
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.