Motorcycle specifications Harley-Davidson1920 Softail Fat Boy FLFB 2025 Majority expression

The Fat Boy deserves its name more than ever, with an engine that's even fatter. 2025 adds the services of the 117 Custom version of the Milwaukee Eight, adding 13 Nm and 9 horsepower to the twin. Its exterior doesn't give away its larger displacement, but the large bevelled Touring air filter, the small 117 lettering and the new badge at the base of the engine will tell connoisseurs of its new pretensions. In fact, it inherits new cylinder heads, redesigned exhausts, a new fuel injection system and optimized cooling.

More paunchy, the new Fat Boy is also more technological. The MoCo takes it into a more comfortable and safer mode, with the addition of a USB-C socket, an adjustable brake lever, new gauges, a revised speedometer and a series of riding aids: tire pressure monitoring, cornering ABS, C-TCS traction control and C-DSCS residual torque management (both angle-sensitive) as well as 3 riding modes (Rain - Road - Sport) propel the Harley into today's future.

A technical shock for the ascetic, in line with the ongoing modernization of its machines. Like the addition of cruise control in 2023. Invisible on the bike and only activated by a desire for cruising.

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And then, you don't just touch the Fat Boy. You can embellish it, infuse it with electronics and stuff it with cubic inches, but when it comes to design, you're touching a sacrament. Except during the great Softail turnaround that ousted the Dyna. This piece of stylistic marble and steel with a patina of history couldn't resist a daring designer. The Fat Boy is even more Fat, and its forehead is now more neo than retro.

It was a daring move. And Harley dared. The face of this Fat Boy will shake some people up. Still hooded, the headlight has clearly gone modern. With a hint of Suzuki VZR 1800 Intruder. A breath of impertinence that only grazed the forks, leaving the whole silhouette in its comfortable absorbent cotton of conformism. A touch of zest, however, for the rims, with their American muscle-car-like presence. The tires become monstrous: 240 at the rear, and a 160 at the front - the widest ever fitted to a production H-D. Once the mount of the Terminator, the Fat Boy would fit right in with Fast & Furious.

A cheekiness that the bike can fully assume thanks to the Milwaukee Eight engine. At 1923 cm3, the cylinders are more than capable of delivering big torque. 16.1 mkg of torque hammer the rear gumshoe, which is 240 mm wide (+ 40 mm). Purists may cough at the knowledge that 4 valves per cylinder. But this modern block, designed to last and evolve, is sure to put a smile on your face. With such cubic capacity, it goes even further than the thundering 2017 Fat Boy S, set alight by the Twin Cam Screamin' Eagle of ex-CVOs.

Fat Boy in spirit and Softail in technique. As a result, the machine benefits from Harley's major evolution. The frame, redesigned, reinforced and lightened, requires 50% fewer parts and 22% fewer welds. Almost 6 kilos lighter, it is 65% stiffer. All in all, the overall chassis rigidity has been improved by 34%.
An improvement in handling, enhanced by new suspension. The rear is completely redesigned with a monoshock (with easy preload adjustment), while the front uses the same forks as the Touring models. To conclude, and going against its name, the new-generation Fat Boy loses weight. Technical upgrades have shaved almost 20 kilos off its weight.

M.B - manufacturer's photos