the Titanium Series the Ti XX is billed as the most expensive motorcycle in the world.
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1912 Henderson Four
Thisultra rare first year 1912 Henderson 4is believed to be one of six surviving machines. An older restoration, the bike was purchased from Cape Town, South Africa in 1983 and thirty years later, it became one of the 50 most valuable motorcycles ever sold when it fetched $236,500.