Haggerty built 4 identical bikes for the movie, but 3 were stolen/dismantled, and the 4th destroyed in the film. When the filming was over Haggerty had to salvage and restore/rebuild/recreate, what ever you want to call it, the bike. The bike here is a reincarnation of the Captain America bike, but to say it's the one Fonda road in the movie is a stretch.
Could you take a piece of burnt metal, rebuild the Hindenburg, and legitimately call it the original?