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GreenProduct
Scooter-like traits began to develop in motorcycle designs around the 1900s. In 1894, Hildebrand & Wolfmueller produced the first successful two-wheeler, with a step-through frame. Its fuel tank was mounted on the down tube, its parallel two-cylinder engine was mounted low on the frame, and its cylinders moved fore-and-aft. It was water-cooled and had a radiator built into the top of the rear fender. It became the first mass produced and publicly sold powered two-wheel vehicle, and among the first powered mainly by engine rather than foot pedals. Maximum speed was 40 km/h (25 mph). The rear wheel was driven by pistons similar to those in a locomotive. Only a few hundred such bikes were built, and the high price and technical difficulties...
