The same things happening to me at the moment stefano, i'll be riding along and the bike just loses ALL power. Pull over, turn the key and she fires up again, thing is it's happening three or four times an hour and it's becoming a safety issue now, had a few close calls. If i put it in a garage with no knowledge of where to start it'll cost me a bomb so trying to get some info now before i put it in.
Do you know which fuse and whereabouts it is on the bike? It sounds like we've both got the same problem, seems to happen when i hit a bump aswell so i don't know if it's a connection or somethin?