Re: European lightweights
Monet Goyon Motorox 34cc 1948, France
EDIT. A postscript to this, there was a designer working for Monet Goyon who had his own engine he wanted used in the bike. Monet Goyon stuck with the 34cc unit they already had and went bust. The designer took his engine to somebody else and it became the basis for millions of Mobylettes.