Originally Posted by Sid Squid

Ordinarily you just tighten the strap 'round the bars, inboard of the switchgear, although I normally make a hole in the muffs and put the mirror mount through them, (bolt in the mirror mount on a faired bike).
When they get a bit older thay can get a bit floppy, (fnarr), if this happens or if they flap about a bit, make a hole in the end and put the bar end screw with a washer on it through the hole so it's secured at both ends, this is a good idea if you find the muffs pull on the levers at higher speeds.