The sun visor on my Nolan keeps flipping down at speed. It only started to do this after about riding most of the summer. It does not come all the way down but drops down about half way at the most inopportune times. It is just slightly annoying. I had a Schuberth helmet for several years and the face shield would pop down, actually would slam down and the cure was to buy new parts that went into the mechanism. Then they would lose their fixation properties after a while.
Is this what I have to do with my Nolan? Buy new friction parts?