Motorcycle specifications Harley-Davidson1920 Softail Fat Boy Gray Ghost FLSTFI 2025 Metal Gray Solid
presentation of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025
The Fat Boy may not have invented the custom bike, but it did give it new credentials, almost to the point of becoming an emblem of the category. A product deeply rooted in the image of America: big tires, big engine, big mouth and big charisma. This model, which was only to remain in the range for a short time, is still around 35 years after its birth. So Harley decided to celebrate with a special Gray Ghost series.
Shining brightly
A flash in the night! This steel phantom shines, sparkles and parades like a jet-setting megalomaniac. This Harley is guaranteed to dislocate the cervical vertebrae of every gaze. The finish pushes its level to the point where its shimmer transposes the spirit of light. Thanks to the PVD process applied to the mudguards and fuel tank, the mirror effect is striking. It's as if the machine had drowned in chrome... or perhaps a T-1000 in liquid metal has changed its programming to become this Gray Ghost and better trap Schwarzy' (the Fat Boy is, remember, the motorcycle in a key scene in Terminator 2).
To better blend in with its identity, the bike covers its frame in "Bright Silver" gray, receives a host of chrome parts and then multiplies nods to the original model - the air filter is round, the saddle is adorned with laces, the rocker covers feature yellow trim, the brand logo has the same profile as back then, and the center console discreetly displays a "35th Anniversary" inscription. Then, less modestly, announces the progressive number in this limited edition of 1,990; like the model's year of birth. A leather strap concludes the attention to detail on the tank.
The most attentive will have spotted the small "Icons" badge behind the saddle. This is the crest for the Milwaukee models in this specialized collection, where Harley expresses its past and brings it to life through commemorative models. There was theElectra Glide Revival in 2021, the Low Rider El Diablo the following year, then theElectra Glide Highway King, and last year brought a Hydra Glide Revival. The Fat Boy Gray Ghost writes the 5th volume of this novel.

So much technology since the beginning
Close the page and press the starter button. The huge Milwaukee-Eight engine comes to life. Like the standard Fat Boy, it grunts its 117 cubic Inches! That's 1923 cm3 of mechanical depth. Big, fat breath, chewing up its power and expelling it into a huge 240 mm gumdrop. Except that it has lost a tiny bit of watts: 101 hp on the Ghost versus 103 on the normal model. A little less torque, 165 Nm versus 168, but this maximum is available 250 rpm lower, at 2750 rpm. When you think that the first Fat Boy of the dynasty produced just 67 hp and 97 Nm from the twin 1340 Evolution....
Which arrived unfinished, carbureted and controlled solely by the right hand. Today, the M8 117 block can be calibrated in 3 variants, depending on the model it's installed in: "High Output", "Classic", or "Custom". It's the latter that drives the Fat Boy, with its emphasis on acceleration. On top of this, Harley installs three riding modes (Sport / Road / Rain), traction control, ABS cornering and residual torque management. Riders can also take advantage of tire pressure monitoring, a USB-C port, all-LED lighting and cruise control.
For its 35th birthday, the Fat Boy enters Harley-Davidson's revival-prestige selection, the Icons, with a spectacular dress of light and silver. A finish that costs an extra 3,500 euros. A detail for her, the pinnacle of a story for others.
M.B - manufacturer's photos

Key facts Harley-Davidson 1920 Softail Fat Boy Gray Ghost FLSTFI (2025) : What you need to know before you buy
Prices
| Basic version | |
|---|---|
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30,390€
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$25,399
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34,000€
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£25,195
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Model sold in 2025
Replace 1870 Softail Fat Boy 30ème anniversaire FLFBS 2020
Performance
- Max speed : over 175 km/h (108.70 mph)
- Average fuel consumption : 5.50 liters/100km (0.43 mpg)
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Estimated range
: 344 km (214 miles)
Calculated range until tank is empty, not verified.
Specifications Harley-Davidson 1920 Softail Fat Boy Gray Ghost FLSTFI 2025
- Chassis
- Frame : Double tubular steel cradle
- Fuel capacity : 18.90 liters (4.99 US gallons)
- Seat height : 675 mm (26.57 in)
- Length : 2,365 mm (93.11 in)
- Width : 965 mm (37.99 in)
- Min height : 1,107 mm (43.58 in)
- Wheelbase : 1,650 mm (64.96 in)
- Weight when fully loaded : 315 kg (694 lb)
- Front axle
- Fourche telescopique Ø 41.3 mm, Wheel travel : 130 mm (5.12 in)
- Angle de chasse : 30 °
- Braking 1 disc Ø 300 mm (11.81 in), 4-piston caliper
- Front tire : 160 / 60 - 18 → Order this type of tire
- Transmission
- 6 stage gearbox , manual
- Secondary belt drive
- Rear axle
- Under-seat monoshock, Wheel travel : 86 mm (3.39 in)
- Preload adjustment
- Braking 1 disc Ø 292 mm (11.5 in), 2-piston caliper
- Rear tire : 240 / 40 - 18 → Order this type of tire
- Motor
- two-cylinder 45° V-shaped , 4 strokes
- Injection
- Cooling system : by air
- tumbled
- 4 valves per cylinder
- 1,923 cc
- 101 ch (99.60 hp) to 5,020 rpm
- 16.80 mkg (165 Nm) to 2,750 rpm
- Power-to-weight ratio : approximately 3 kg/ch
- Weight / torque ratio : approximately 17.78 kg/mkg
- Compression : 10.3 : 1
- Starting system : electric
- CO² emissions: 128 g/km
- Standard equipment
- Brake assist : ABS standard
- Number of riding modes : 3
- ABS Cornering
- Gear indicator
- Cruise control
- USB plug
- Keyless ignition
- Traction control
- Engine-brake control
- Tire pressure monitoring system
- Practical information
Gallery
Used
Compare the 1920 Softail Fat Boy Gray Ghost FLSTFI to its competitors
Price
Acceleration
Fuel consumption
Range
Torque
Power
Power-to-Weight ratio
Torque-to-Weight ratio
Speed
CO² emissions
FAQ Your frequently asked questions about the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025
- What is the power of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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The 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 develops a power of 101 ch (99.60 hp)
- What is the torque of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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The maximum torque of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 is 16.80 mkg (165 Nm) to 2,750 rpm.
- What is the maximum speed of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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The 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 is capable of reaching a top speed of over 175 km/h (108.70 mph) on the track.
- What is the weight of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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The 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 has a a weight when fully loaded of 315 kg (694 lb).
- What is the fuel consumption of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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Average fuel consumption is estimated at 5.50 l/100km (0.43 mpg) according to the WMTC cycle.
- QWhat is the seat height of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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To ensure good accessibility, the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 offers a minimum seat height of 675 mm (26.57 in).
- What is the price of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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The price of the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025 is £25,195 in United Kingdom. It is displayed at $25,399 in the United States, at 30,390€ in France and at 34,000€ in Spain.
- What colors are available for the 1920 Softail Fat Boy Gray Ghost FLSTFI 2025?
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For the 2025 model year, the 1920 Softail Fat Boy Gray Ghost FLSTFI is available in one color: grey.
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