A good part of the exhibition space at the 2007 Tokyo auto show is devoted to motorcycles. Manufacturers such as Yamaha, Suzuki, and Honda had some fascinating concept bikes on display, showing how they see the future of motorcycling. From big, high-tech concepts that look like they came straight out of Akira, to green and clean fuel-cell scooters, these bikes show off two-wheelers for every purpose. And there's even a four-wheel motorcycle in the mix.
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