Well, I suppose now my Triumph has a home here on my Miata page. I'm sure there's a CarDomain-type site out there for bikes, but I just don't care to have another subscription, another password, and another chance of getting spammed into oblivion.
So, here's what I got done today (31 May 08):
For quite some time now, my mirrors have been loose at the joint. For those of you who don't know, the Sprint ST has a hinge on the mirror so you can clip a car or drop the bike or whatever without breaking your mirror too bad. Well, the design of the hinge involves a serrated stem and washer. After the hinge bends over and over again, the washer moves up and puts less pressure on the joint, resulting in a loose, floppy mirror.
I decided to take some advice from a member of a Sprint ST email list I'm on and fix it 'in-house', just not IN my house. Actually it was done IN Ace Hardware in Ooltewah, TN. And, yes, I mean IN the hardware store.

They were cool enough to say "hey, bud, why not bring the bike in here?" after watching me grab a bolt, walk outside. Come back in. Grab another size bolt. Walk outside. Come back in.
Ad infinitum.
So, anyway, after a few experiments with different sizes and such, I have come up with this.
I used 2 each of the following, one for each mirror hinge:
10x24 1.25" dome head, counter-sunk machine bolts
7/16" washer (this fits just over the center post)
M5 fender washer
10x24 nylon-type lock nut

So, there you have it. And it doesn't really seem all that conspicuous under the mirror arm cover.

Well, I hope you found this useful. If you want any more pics, you can always ask.