1974 rotary-engined DKW W2000 DKW 1919-81 Germany From the late Twenties until WWII, DKW was the most influential two-stroke motorcycle maker in the world. They pioneered the loop scavenge principle, which utilised crankcase compression, employed ‘supercharging’ pistons and, later, rotary valve induction on their racers. They were for many years the world’s largest volume motorcycle…
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