I've got an 07 RKC and lately the left mirror has come "loose" where it attaches to the stem. This allowed it to drop down out of adjustment, sometimes just whie sitting at idle. It became very annoying to me so I decided to try an experiment. Nothing to loose, right? I didn't want to try this with the mirror off the bike, fearing I'd lose my setting. After getting the mirror pointed where I wanted it, I applied a few drops of blue locktite to the ball area (where the mirror rotates). I'm happy to report that after 2 days and about 100 miles, the mirror has not moved. I'm a little hesitant to move it for a test, fearing I'd break my "seal". But then again, I don't need to as it sits right where I want it to. Just thought I'd pass this along as I have heard of others with a loose mirror, mostly the left side.