I've been a motorcycle rider since the age of 15 and recently upgraded from my Valkyrie to a Goldwing. While the Honda Goldwing is the finest touring motorcycle in the world, I wasn't happy with the location of the GPS. A friend who also wasn't happy with it mounted his GPS above the vent by drilling holes in the windshield. I liked the location he chose but wanted a mount that didn't require the extreme solution of drilling holes. So I created the EZ-GPSMount. I've been using that vent mount for over a year now and loved it so much I launched EZ-GPSMount.com so others can enjoy it too.
Our vent mount requires no drilling, mounts in seconds with a single wingnut, and is completely stable.
Here on the EZ-GPSMount website are pictures taken this past Fall of me riding the Cherohala Skyway. Look closely and you can see the mount in the center of the windshield above the vent.
I know that you'll be as happy with your mount as I am with mine.