I have 11,000 miles on mybike . the stock mirror on the left is loose. any way to tighned up?

 

depends on what part is loose. if it is the stem, easy... acorn nut underneath. at the mirror, if it like mine, there is no way to tighten it. either replace it, dealer replaced mine, or super glue the sob like i did till the new one came in

 

Yeah I forgot to mention it is not at the stem its at the ball type adjuster behind the mirror. I now tighneing the acorn nut is a no brainer!!!