For the 2010 model year, the Harley-Davidson FLSTFB Sportster Fat Boy Special motorcycle has a listed dry weight of 690 lb (313 kg).
Harley-Davidson FLSTFB Sportster Fat Boy Special 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 FLSTFB Sportster Fat Boy Special?
dry weight
Using a model-level dry weight comparison, the Harley-Davidson FLSTFB Sportster Fat Boy Special is heavier than about 56.7% 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 FLSTFB Sportster Fat Boy Special weight & related specs
| Model years covered | 2010 |
|---|---|
| Dry weight | 690 lb (313 kg) |
| Engine displacement | 1,584 cc |
| Torque | 92.2 lb-ft (125 Nm) |
| Fuel capacity | 5.2 US gal (19.7 L) |
| Full-tank fuel weight (estimated) | 32.4 lb (14.7 kg) |
Useful weight calculations
| Torque per 100 lb | 13.36 lb-ft / 100 lb |
|---|---|
| Displacement per pound | 2.3 cc / lb |
| Weight per 100 cc | 43.6 lb / 100 cc |
| Fuel weight as % of bike weight | 4.7% |
| Weight with full tank | 722.4 lb (327.7 kg) |
What the weight numbers tell you
Harley-Davidson FLSTFB Sportster Fat Boy Special weight FAQ
How heavy is the Harley-Davidson FLSTFB Sportster Fat Boy Special?
Listed dry weight is 690 lb (313 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 FLSTFB Sportster Fat Boy Special heavy compared with other Harley-Davidson motorcycles?
It sits fairly close to the middle of the category. Its representative dry weight is around the 57th percentile among 45 compatible Harley-Davidson motorcycles.
How much does the Harley-Davidson FLSTFB Sportster Fat Boy Special fuel weigh?
The listed tank capacity is 5.2 US gal (19.7 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 32.4 lb (14.7 kg). That is an estimate for fuel mass, not an official Harley-Davidson curb-weight calculation.
How heavy is the Harley-Davidson FLSTFB Sportster Fat Boy Special with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 870 lb (394.6 kg) using the representative dry figure. Gear and luggage would add more.
Can I treat the Harley-Davidson FLSTFB Sportster Fat Boy Special 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 722.4 lb (327.7 kg), and oil/coolant or definition differences may add more.
What is the Harley-Davidson FLSTFB Sportster Fat Boy Special full-tank weight estimate?
The page calculates about 722.4 lb (327.7 kg) with a full tank by adding the listed fuel mass to the dry figure. Treat this as a practical estimate, not an official Harley-Davidson curb-weight number.
What is the Harley-Davidson FLSTFB Sportster Fat Boy Special torque-to-weight ratio?
The calculated torque-to-weight range is 13.36 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
How large is the Harley-Davidson FLSTFB Sportster Fat Boy Special engine for its weight?
Engine displacement relative to bike weight is 2.3 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
Is the Harley-Davidson FLSTFB Sportster Fat Boy Special above or below the typical Harley-Davidson motorcycle weight?
The model sits about 57.3 lb (26 kg) heavier than the compatible median Harley-Davidson motorcycle weight used on this page.
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.