Cruisers
2017Harley-Davidson Fat Boy S
25 fields on record
The 2017 Harley-Davidson Fat Boy S adds a 1801cc Screamin' Eagle Twin Cam 110 V-twin to the classic Fat Boy formula, making 146 Nm. It weighs 333 kg wet and carries 18.9 litres of fuel.
- Capacity
- 1801.0 ccm
- Engine
- V-Twin, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 320.0 kg
- Seat height
- 670 mm
- Power
- Not on record
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What’s new for the 2017 Harley-Davidson Fat Boy S
vs the 2016| Spec | 2016 | 2017 |
|---|---|---|
| Engine capacity | — | 1801.0 ccm (109.90 cubic inches) |
| Power | 92.5 HP (67.5 kW) @ 5250 RPM | not listed |
| Torque | 146.0 Nm (14.9 kgf-m or 107.7 ft.lbs) @ 400 RPM | 146.0 Nm (14.9 kgf-m or 107.7 ft.lbs) @ 4000 RPM |
| Front suspension | Telescopic fork | 41.3 mm telescopic, chrome dust covers |
| Rear suspension | Twin shocks | Hidden, horizontal-mounted, coil-over shock |
| Front brakes | Double disc. ABS. 4-piston. | 2x Discs 4 piston caliper |
| Rear brakes | Single disc. ABS. 4-piston. | Single disc 2 piston caliper |
| Compression | 10.0:1 | not listed |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for bold, low-slung boulevard cruising and making a visual statement rather than covering ground quickly or attacking corners.
- Built for
- A muscular, chest-thumping factory custom that pairs a torquey big V-twin with fat tires and blacked-out styling for maximum street presence.
- Not ideal for
- Not the right choice for riders wanting agile cornering, off-road capability, or a light and nimble daily commuter.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usReliability & safety
Bike Reliability score, safety recalls and owner complaintsBike Reliability
How the score works →90
out of 100Excellent
The Harley-Davidson Fat Boy S passed its annual roadworthiness test first time 91.7% of the time, 8.7 points above expected for bikes of the same age and mileage. That beats 90% of models.
This covers every year of the model.
91.7%Passed first time
3.7%Failed outright
4.6%Fixed during test
6,000Typical miles
109Tests
Against its rivals · ranks 3 of 6
| # | Model (all years) | Score | Tests |
|---|---|---|---|
| 1 | Indian Chief | 95 Excellent | 826 |
| 2 | Indian Chief Dark Horse | 93 Excellent | 282 |
| 3 | Harley-Davidson Fat Boy S | 90 Excellent | 109 |
| 4 | Harley-Davidson Fat Boy | 83 Excellent | 6,083 |
| 5 | Harley-Davidson Softail Slim | 76 Good | 2,367 |
| 6 | Harley-Davidson Sportster Forty-Eight | 73 Good | 1,854 |
Rivals are the most-viewed bikes on MotorcycleDB in the same category and engine size, from within three years of this model.
From British annual roadworthiness tests, 2005-2025. Contains public sector information licensed under the Open Government Licence v3.0 (DVSA MOT test data, Great Britain). How Bike Reliability works.
Engine
- Capacity
- 1801.0 ccm
- Torque
- 146.0 Nm (14.9 kgf-m) @ 4000 RPM
- Engine type
- V-Twin, four-stroke
- Bore x stroke
- 101.6 x 111.1 mm
- Cooling system
- Air
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Single-fire, non-wasted, map-controlled spark ignition
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Belt
Dimensions & weight
- Wheelbase
- 1630 mm
- Overall length
- 2385 mm
- Seat height
- 670 mm
- Dry weight
- 320.0 kg
- Wet weight
- 333.0 kg
- Fuel capacity
- 18.90 litres
- Ground clearance
- 125 mm
Chassis & suspension
- Frame
- Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded
- Front suspension
- 41.3 mm telescopic, chrome dust covers
- Rear suspension
- Hidden, horizontal-mounted, coil-over shock
- Trail
- 147 mm
Brakes & wheels
- Front brakes
- 2x Discs 4 piston caliper
- Rear brakes
- Single disc 2 piston caliper
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2016 | 2017 |
|---|---|---|
| Capacity | — | 1801 cc |
| Dry weight | 320 kg | 320 kg |
| Seat height | 670 mm | 670 mm |
| Fuel capacity | 18.9 L | 18.9 L |
| Bike Reliability ⓘ | Too few tests | Too few tests |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Harley-Davidson Fat Boy S?
The 2017 Harley-Davidson Fat Boy S has a Capacity of 1801.0 ccm (109.90 cubic inches).
How many gears does the Harley-Davidson Fat Boy S have?
The 2017 Harley-Davidson Fat Boy S has a Gearbox of 6-speed.
What is the torque of the Harley-Davidson Fat Boy S?
The 2017 Harley-Davidson Fat Boy S has a Torque of 146.0 Nm (14.9 kgf-m or 107.7 ft.lbs) @ 4000 RPM.
How much does the Harley-Davidson Fat Boy S weigh?
The 2017 Harley-Davidson Fat Boy S has a Dry weight of 320.0 kg (705.5 pounds).
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