1939 Mercier Moto-Сhenille, from France...
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The Mercier "tracked motorcycle" was equipped with a 350cc OHV JAP engine, rated at 10 horsepower at 3,000 rpm allowing it to move at a comfortable speed up to 65 km/h.
Additional cooling of the cylinder head was provided by a fan, driven by the engine.
The Mercier "tracked motorcycles" were equipped with a kick starter, which could be reached even while sitting behind the wheel. They were also equipped with a three-speed manual gearbox, produced by the French company Soyer.
The front part was a complex construction with 150 mm wide rubber tracks and a suspension realized with semi-elliptic springs.
The first prototype had a large armored shield, because of which
the motorcycle couldn’t ride through the dirt.
The rear part of the motorcycle turned out to be quite long and simple, a tubular frame with attached: saddle, footboards, petrol tank, and a 270/90 rear wheel.