Folklore has long been a source of fascination and inspiration for human creativity. The eerie British legend of a spectral black dog roaming the countryside has now found expression in an imaginative Harley-Davidson custom bike build. German workshop Thunderbike channeled the foreboding myth into their stunning Black Dog Fat Boy mod.

In British Isles mythology, the black dog apparition was viewed as a nocturnal harbinger of death. Its glowing red eyes inspired dread, though some saw it as a supernatural guardian over travelers. Thunderbike’s Fat Boy remake evokes the creature’s ominous aura through stylized visuals.

While mainly an aesthetic tribute, the custom shop added some “magical” illusions. The Black Dog Fat Boy appears to “hover” thanks to a smoothed-out air suspension system. This technical trickery lets the bike elegantly rise and lower as if supernatural forces were at play.

From its shadowy all-black color scheme to sinister graphics, the bike conjures the folkloric black dog. Blood-red eyes glare menacingly from the fuel tank when illumination hits its airbrushed art. The overall dark vibe is amplified by blacked-out finishes on all customized parts.

The shop’s clients clearly wanted a bold custom bike to turn heads. Building off the Fat Boy’s bulky foundation, Thunderbike created a showstopper that stands apart even in Harley’s heavyweight class. No hints of chrome soften its imposing presence.

Thunderbike started the fat-trimming transformation by swapping the stock Fat Boy wheels for slender five-spoke rims. Machined from aluminum, the 23-inch front and 21-inch rear wheels wear wide Metzeler tires. This mod elongates the silhouette for a more athletic stance.

Further enhancements include a swingarm kit supporting the wider rear wheel, extended front fork, and mini rear fender. Up front, the chunky headlamp gets a makeunder with a compact LED bar. Only the essentials remain to amplify the stripped-down attitude.

Performance upgrades match the bike’s sinister style. A Milwaukee Eight 114 V-twin engine provides monstrous power, amplified by shorty Dr. Jekill & Mr. Hyde exhaust pipes. Customers craving even more punch can opt for a Screamin’ Eagle 131 crate motor.

Over 30 custom parts deepen the Black Dog’s blacked-out aesthetic. Contrast stitching on the saddle and grip pads adds eye-catching detailing. The overall execution exudes first-class quality with integrated ergonomics.

This extensive custom build adds up to a hefty price tag. Though the total cost remains undisclosed, Thunderbike parts alone total nearly $15,000. The air suspension, exhaust system, paintwork and hours of expert labor further increase the investment.

Yet for passionate Harley owners, enhancing a prized Fat Boy into a mythical one-of-a-kind creation justifies the expense. This Black Dog build achieved their vision through world-class craftsmanship.

By channeling folklore and fantasy into a functional machine, Thunderbike injects imagination into the custom scene. The Black Dog Fat Boy’s otherworldly illusion reflects the magic of mythology made real through ingenuity.

The client’s British heritage inspired this clever tribute to their homeland’s legendary black dog. The custom shop expertly adapted the regional lore into a motorcycle format their client could ride with pride.

Thanks to the crew’s creative spark, the ghostly black dog has now materialized as a collectible Harley custom. Its hand-crafted quality and sinister style offer thrills beyond a stock Fat Boy’s rumble.

Owning this rolling tribute to British folklore represents a special achievement for its rider. The Black Dog Fat Boy will likely become a darling of European motorcycle shows. Its outlandish concept sets it apart even among showstopper customs.

By infusing their Harley build with eerie mystique, Thunderbike has elevated motorcycle customization into artistry. Their visionary approach reimagines how builders can draw from culture and history as inspiration.

The Black Dog Fat Boy exemplifies how custom shops can transform machines into mythical creatures. Its otherworldly allure and meticulous execution reflect pure motorcycle magic.