AWO 250 Twin

At AWO/Simson in Suhl/DDR [(East) Germany] experiments with a desmodromic valve-gear were started at the very end, just before in 1959 the race-department had to close. Unfortunately these experiments could not be brought to an end.
Source: Heisse, Michael "Viertakt-versuche" In: "Markt" Motorrad Spezial; Nr. 2, 1988/89

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