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Beskrivelse
The first motorcycles were little more than bicycles with basic engines strapped onto them. Over time, these "bone shakers" have evolved into powerful, agile vehicles that riders take off-road and race in what have become some of the hottest new extreme sports of the last decade Young readers will be mesmerized by Superbikes, Speedway, and Grand Prix racing; motocross and trail bikes; and rallying.
