shake

So, before some of you flame me for not searching, I've been around this site for a while and I have done my searching - I'm so stupid as to post a question without having searched for the answers first. I have a relatively specific question regarding my specific situation and which of a couple...

I have a 05 636. Tires look to be newer and I am the 2nd owner of the bike. Recently when cruising around 70-55 mph and let off the throttle and let go of the handle bar the bike develops a wobble and shake. It goes away when i grab the handle bars or that it drops below 55 mph. The bike is...

I have an 03 636 and I found that if I take my hands off of the handlebars between 50 and 60 mph they shake. If I do at lower or higher speeds than that, they don't. Could the solution be as simple as getting my wheels balanced? Any other thoughts or suggestions? Thanks!