Rather Yamaha than Honda? It could be a Suzuki Colleda 125 or 250 of the very early 60's. (But not a Honda, you're sure right.) SUZUKI biensur http://www.rockersbikeads.co.uk/Motorcycles/Suzuki/Suzuki-50%20MD-1962-1.html 1962 50MD similar looks, smaller engine ? Looks like circa 1966 Suzuki M15 (50cc) - http://www.suzukicycles.org/1960-1969/1966a.shtml - http://www.suzukicycles.org/photos/M/M15/1966_M15_600.jpg
I didn't expect that! Thanks!