French rare Soyer sporty 500cc OHC with king shaft. Older but very nice restoration of an overhead camshaft Soyer with king shaft. Rarely offered, only a few of these motorcycles are known.

Soyer made motorcycles from 1920 to 1935. She used various built-in engine blocks such as Aubier-Dunne, Chaise, JAP and Sturmey-Archer. Until she built an overhead camshaft engine herself following the example of Charter-Lea in England. She achieved many successes with these models.

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