Peter, thank you for your detailed comment on Italy and Suisse!
Bikers licence and helmet is no problem for me as I've got both but important to know for others!

The experience I had with Italian police was very positive so far but a friend of mine - lawyer in Milano - got his scooter confiscated when he rode without helmet.
Better to be careful....

Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life