The motorcycle ridden by the character Arthur "Fonzie" Fonzarelli, played by Henry Winkler, on the television show Happy Days was a 1949 Triumph Trophy TR5 Scrambler. It was not a Harley-Davidson motorcycle. The exact cost of the motorcycle used in the show is not readily available information. Additionally, it's worth noting that the motorcycle used for filming may not necessarily have been purchased at its market value, as it was likely a prop provided by the production team.