It may not have the rumble or sex appeal of a Harley-Davidson or the blazing speed of a Kawasaki Ninja, but a Swedish motorcycle builder knows how to pack power in a pint-sized product. "Having built the world’s biggest working motorcycle, Tom Wiberg, 40, has constructed what he says is the world’s smallest, weighing in at just 1.1 kilogram (2.4 pounds)."

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