Yes I've seen the signs, with my limited vocabulary of German and Italian, (I can speak enough of both languages to get me into trouble but not enough to get out!!!)
The ones I've seen are a red, round sign with a symbol of a bike inside it, and underneath there has been Sa-So (samstag and Suntag) (apologies for incorrect spelling), motorcycles banned Saturday and Sunday, 15 of us got stopped and pulled into a layby, one of us (not me) could speak enough German to get us virtually out of trouble, negotiated fine for 2 of us @ 15 Euros, and they let us carry on to the other end of the road, something tells me they were not the Gestapo!
We could have spent 3 days in the cooler.
Also beware of speed limit signs with a bike symbol underneath with a lower speed limit, it's a lower limit for bikes.
It's the weekends that cause the trouble, in my experience during weekdays out of season it's generally O K.
