In 2013, the American motorcycle manufacturer launched the Harley-Davidson Fat Boy, which received various design, technical, and performance modifications over the years, including several displacements increases.
The Harley-Davidson Fat Boy debuted in 1990 and soon became known for its wide and muscular appearance, distinctive styling, and powerful engine. The model manufactured from 1990 to 2017 were coded as FLSTF, and those produced from 2018 were coded as FLFB and FLFBS.
A false etymology was circulating, claiming that the bike name was a contraction of Fat Man and Little Boy, two atomic bombs that fell on Japan during WW2. Some said the name was a symbolic insult to Japanese bikes, but the H-D vice president noted that it was a simple descriptive name without any connection to their Japanese competitors.
The 2013 Harley-Davidson Fat Boy came equipped with standard features, including a round headlight with a chromed housing, a teardrop-style fuel tank, a two-piece dual seat with a removable passenger unit, a chopper-style rear fender, a custom front fender, bullet-style turn signals, and full disc aluminum wheels with a bullet hole design.
The bike's power was coming from a 1,690cc air-cooled V-twin black powder-coated engine with chromed head covers and cooling fins, fed by an electronically controlled fuel injection system, delivering smooth power and 134 Nm (99 lb-ft) torque with a maximum peak force at 3,000 rpm.