Set the sedanโs safety brake and hop on your โhogโ for a 2-hour high-speed history of the motorcycleโfrom the 1868 โsteam velocipedeโ to the early 20th century, when they were a low-cost alternative to automobiles; from Harley-Davidsons preferred by Hellโs Angels and police to motocross riders who take bikes into the air and onto the dirt. We also look to the motorcycleโs future, featuring Jay Lenoโs jet-propelled Y2K sportbike and Erik Buellโs bike-without-a-gas-tank creation.