DL650 k7. Just Fyi.
Had a rattle for a while now over bumps and was convinced it was something rattling inside my helmet as it was so loud. Changed helmet noise still there. Sounded like shaking a bean inside a plastic box everytime I went over a bump....very annoying. Turns out the noise was coming from the left mirror! Took the mirror off and it was rattling and knocking like you wouldn't believe. Drilled a hole at the bottom and filled with expanding foam. Fixed. I'm sure this has been covered before but a reminder was in order.