Muddypaws, maybe they weren't tight enough in the first place. I have found a lot of fastners on my bike (same as yours) that I would consider just barely tight enough or on the loose side, even my rear caliper bolts were just barely tight enough. I torqued them after I checked my rear brake pads and the bolts went about 1/4 turn farther when I put the caliper back on to reach specified torque. ( I have been marking every bolt before I undo it so I do not over torque when putting things back together). The bolts I have worked on were only related to my 5k service and things I would normally check before a long ride. There was another post on this and alot of guys have found things not tightened enough besides me. Now I have something else to check. Good luck with your repair.CAHDBIKER