I always thought Motobecane made little pedal start mopeds before just producing bicycles but paging through the WWW I came across this cool looking 1947 350 prototype.

Interesting plug wire placement

It was a factory original single 175 cc

They started making motorcycles in 1922 producing reliable OHV singles until fading out in the 60’s.
Like their cars France didn’t export much.
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You meet some of the best folks behind bars.