I'm halfways sure it says "You meet the nicest people on a Honda", but my trusty translator is not having its day today. I managed to find every character here (extremely useful website) and the only thing I didn;t manage to find was the character 東. Which is rather frustrating. It looks like it, but I'm sure it is not the correct one.
Anyway, the Dutch, German, Britons and French all like their Honda C100 :)