+1, glad you caught this, beat me to the post.Zedex7R said:1. The right hand mirror is reverse threaded. If you buy from a Ducati owner BE SURE to obtain the locking hex nuts for both mirrors. You CANNOT go down to the local hardware store and get a left hand thread, fine pitch 10 mm hex nut. Even 3 different Ducati dealers verified that the only way to get a new set of lock nuts is to order the mirrors from Ducati.