Key performance

73 ch
Power
🔧
1584 cc
Displacement
⚖️
330 kg
Weight
🏎️
160 km/h
Top speed
💺
645 mm
Seat height
18.9 L
Fuel capacity
💰
20 795 €
New price
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Technical specifications

Engine

Displacement
1584 cc
Power
73.0 ch @ 5300 tr/min (53.7 kW)
Torque
122.6 Nm @ 3500 tr/min
Engine type
Bicylindre en V à 45°, 4 temps
Cooling
par air
Compression ratio
9.2 : 1
Bore × stroke
95.3 x 111.1 mm
Valves/cylinder
2
Fuel system
Injection

Chassis

Frame
Double berceau tubulaire en acier
Gearbox
boîte à 6 rapports
Final drive
Courroie
Front suspension
Fourche telescopique Ø 41 mm, déb : 129 mm
Rear suspension
2 amortisseurs sous le moteur, déb : 103 mm

Brakes

Front brakes
Freinage 1 disque Ø 292 mm, étrier 4 pistons
Rear brakes
Freinage 1 disque Ø 292 mm, étrier 2 pistons
Front tyre
140/75-17
Front tyre pressure
2.48 bar
Rear tyre
200/55-17
Rear tyre pressure
2.90 bar

Dimensions

Seat height
645.00 mm
Fuel capacity
18.90 L
Weight
330.00 kg
Dry weight
313.00 kg
New price
20 795 €

Overview

The silhouette needs no introduction. This block of chrome steel and aluminum, with its full wheels and wheelbase that would make a cruise ship blush, is undoubtedly the most recognizable motorcycle in the world. And yet, people often misjudge it. Contrary to what the heads-up display in *Terminator* shows, the motorcycle featured in the film is actually a 1991 Harley-Davidson FLSTF Fat Boy. This confusion itself is a tribute to its iconic status, a machine so ingrained in popular culture that it transcends mere mechanics.

Harley-Davidson FLSTF Fat Boy

Saddling it, the paradox begins. You straddle 330 kilograms all fueled up, place your feet on footrests as wide as surfboards, and grasp a handlebar that seems sized for a semi-trailer. The seat height of 645 mm is derisively low, as if the motorcycle sinks into the pavement. Then you fire up the Twin Cam 96 of 1584 cm3, and the large 45° V-twin begins to tremble with that characteristic nonchalance. The announced power of 73 horsepower seems modest on paper, but what counts here is the torque wave. These 122.6 Nm available from 3500 rpm are the real currency of the Fat Boy. It doesn’t start, it wrenches itself free. It doesn’t accelerate, it displaces the air in front of it.

On the road, the experience is in keeping with its look: massive and theatrical. The belt drive is of exemplary smoothness, and the six-speed gearbox allows you to find a peaceful rev for swallowing up the kilometers. The handling, revised in the early 2000s, is worthy of the name for a custom of this size. It traces its straight line with the authority of a cruise ship, insensitive to gusts. But ask it to change direction with liveliness, and you will understand the meaning of the word "compromise." The 200 mm of rubber at the rear and the imposing weight make tight turns a bodybuilding exercise. The footpegs scrape with disconcerting ease, gently reminding you that this machine is made for boulevards, not hairpin mountain passes.

Compared to an Indian Chief or a Star Boulevard, the Fat Boy S, in its later versions, remains the gold standard of the heavy custom. Its flaw is its quality: it is absolutely faithful to its concept. It is a motorcycle for those seeking a presence, an atmosphere, a mechanical purr that is a sonic signature. For the globetrotter who prefers the sensation of power to the maximum speed figure (capped around 160 km/h), and for whom every trip is a small parade. It is a monument on two wheels, sometimes cumbersome, often illogical, but undeniably charismatic. You don’t buy it for its performance, but to become, for the duration of a ride, the person who goes with it.

Practical info

  • La moto est accessible aux permis : A

Indicators & positioning

Weight-to-power ratio
0.22 ch/kg
🔄
Torque / weight
0.37 Nm/kg
🔧
Volumetric power
45.5 ch/L
In category Custom / cruiser · 792-3168cc displacement (3121 motorcycles compared)
Power 72 ch Top 56%
49 ch median 75 ch 148 ch
Weight 330 kg Lighter than 29%
235 kg median 304 kg 379 kg
P/W ratio 0.22 ch/kg Top 70%
0.18 median 0.25 0.45 ch/kg

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