Blacked-Out Harley-Davidson Fat Boy Becomes a Transformers-Inspired Custom Called Starscream

Fans of Transformers usually associate the name Starscream with military aircraft. Across the years, the Decepticon character has taken the form of machines such as the McDonnell Douglas F-15 Eagle, Lockheed Martin F-22 Raptor, General Dynamics F-16 Fighting Falcon, and even the Harrier Jump Jet. A Harley-Davidson cruiser seems far removed from that world. Yet a custom shop in Lithuania decided otherwise.

The project comes from Killer Custom and starts with a 2021 Harley-Davidson Fat Boy. Rather than rebuilding the motorcycle from the ground up, the builders left two major components untouched. The original frame stayed in place. So did the engine. Their attention focused elsewhere, changing the machine’s visual identity through a long list of carefully selected modifications.

One of the first things you notice is the darker appearance. Chrome surfaces largely disappeared, replaced by black finishes spread across the motorcycle. The transformation reaches nearly every visible area, including the solid disc wheels, engine covers, and exhaust system. A bit of contrast survives on the fuel tank, where a flush-mount cap replaces the standard item, though the overall look remains heavily shadowed from front to rear.

The bodywork received equal attention. Killer Custom fitted a spoiler to the front section of the bike, partly for protection and partly for appearance. Both fenders were redesigned and shortened compared with the stock Fat Boy pieces. The rear section gained a seat shaped to blend into the new fender profile, helping create a cleaner silhouette.

Lowering kits installed at both ends bring the motorcycle closer to the pavement. The stance changes immediately. New LED-based lighting components appear throughout the build, joined by replacement handlebars, fresh grips, and numerous custom covers. None of those modifications alter the engine itself, yet together they create a machine with a completely different presence.

The exhaust system did not escape attention. While internal engine components remained untouched, the pipes were repositioned upward instead of running parallel with the ground. The result nudges the design further toward the mechanical character that inspired the project’s name.

Pricing the complete build is difficult because paintwork and labor costs are excluded. The custom parts alone total the equivalent of $5,600. As for the donor motorcycle, a 2021 Harley-Davidson Fat Boy typically sells between $11,000 and $18,000. For reference, the 2026 model year version starts at $22,599.

The finished motorcycle does not resemble a fighter aircraft. That was never the point. What emerged is a heavily customized Fat Boy carrying a distinct identity and a name borrowed from one of the most recognizable villains in the Transformers universe.