RE: I can't find WAE 342!!
if you had a WAE342 on your bench and compared it to the 3W=342 it would be quite clear. the same base engine was also sold under the name Gilardoni as U/L engine. May be able to part with some of my engines or a similar German engine. It took me a while to learn all the 275cc and up twin cylinder engines, now have quite a collection.