I don't know about you, but the vibes comin' thru the left mirror on my ride suck freeway speeds. I remember from the FZ1 I had that drilling a small hole in the bottom of the mirror and then injecting a few ounces of caulk really helped a lot.
Mine never did vibe in the handlebars and mirrors, even without bar end weights. That's because I replaced the steel bars with a tapered aluminum handlebar (Tag Metals T2) before my first ride. I fitted a solid Moose Racing fatbar adapter/riser, but it can easily be installed with a swivel adapter, as shown in 3rd pic...
I used a can of foam insulation. There's holes in the bottom of the mirrors that are just big enough to put the tube from the can in, Shoot a couple of shots in each hole. Be sure and take the mirrors off so the stuff dosn't get all over the paint and bike. It stopped the loud buzzing.
barsnakes have never worked for anyone I know who has tried them, but YMMV. I also have aluminum bars, 7/8" protapers, which widen the mirrors, but did nothing for the vibes. I'm gonna have to try a few ounces of caulk in the left mirror, in the next few days. It did help on the fizzie1.
you could stick the wheel weights on the bottom of the mirror...they have dbl.sided tape and you can get them in black so they're less noticeable...or once you got the correct weight, you could then remove the weights and inject the correct amt. of caulk, i suppose.