Here's some motorcycle info that a person from this board posted for me - hope it helps:
We have rented several times from Motocenter Thun, in Thun Switzerland, from Bruno, good company. They will hold your extra bags for you. About $100 per day and that includes insurance. Don't get a Harley, those are for freeways, get a bike that can take the corners a BMW is good, the Alps are all about switch backs and that is where you will be. The best time is August or start of Sept. as that is low rain and lots of sun in the Alps (July is high rain). Stay in Murren/Lauterbrunnen Valley for a few days, take the train to Thun to get the bike and travel the several passes the next 2 or 3 days, returning to LB Valley. Susten Pass (spelling?) is my favorite, it's just beautiful. I have routes thru France - Switzerland, Austria, and onto Bled. Italian Alps are great. John Hermans book is good, but his top rated roads are above the tree line on the moon type views, I perfer green mountains.