Eight Liters, 500 Horsepower, Two Wheels: What Makes This Build LegendaryH&H Classics via YouTubeThe Viper V10 motorcycle is not a concept or a show piece. Millyard pulled the 8.0-liter, 500 bhp V10 from a Dodge Viper and adapted it to motorcycle duty through entirely hand-fabricated componentry — custom frame, custom exhaust routing, custom everything. A 500 bhp, 207 mph hand-built motorcycle belongs on a road — or at minimum, a runway — not behind glass. What This Sale Signals for the Extreme Custom MarketMillyard's work occupies a specific and rarefied corner of the custom motorcycle world. For now, the Viper V10 motorcycle has a new home and, apparently, a new owner willing to actually use it.