I used a K&N.  It's a little pricey but, when it comes to the bike, price means little to me.  K&N has a product selection guide right on their website.  You can use this to choose the filter made for your bike.

The model number for the Yamaha Virago 1000-1100, all years, is YA-1186.  I tried to order this from the local Yamaha dealer, but the part number wasn't listed in any of his books.  I thought this was kind of strange, seeing as though the Virago was one of Yamaha's best selling bike of all time and that the Virago line was dropped only in 1999 (except for the Virago 250, of course).  I seriously hope this isn't a sign of things to come!

Anyway, installing the air filter was really quite easy.

Tools:

- 5mm Allen Key wrench (Hex key)
- Large Phillips Head screwdriver
- Soft, clean, cotton cloth

Use the Allen Key Wrench to remove the two bolts on either side of the air cleaner.  Careful not to loose the spacer on the front bracket.

Use the Phillips screwdriver to loosen the clamp that holds the rubber hose to the frame/airbox of the bike.

Give the whole assembly a few shakes and it should come right off in your hands.

Bring the assembly to your work bench and remove the two, long screws from the back of the airbox.  There's one screw located directly in front of the rubber airhose and one behind, near the edge

Remove the front cover of the airbox.  Inside you will see two small brackets that hold the existing airfilter in place.  Remove all of the screws that hold the brackets in place.

Insert the new filter, making sure the larger end is facing forward.  When I installed my filter, the writing on the filter was actually upside down.

Re-install the two brackets to hold the new filter in place.  If you had a large screw in there, you won't be using this anymore.

Replace the airbox cover making sure you don't damage the foam gasket.  This is a little tricky.  When I put my cover back on, I inserted the long screws into the back and just screwed them in a little bit.  I was then able to fiddle with the foam gasket without having the airbox cover fall off.

Now all that is needed is to reinstall the airbox on to the bike.  Fit the rubber breather hose over the airbox fitting and wiggle it into place.  Use the Phillips screwdriver to tighten the clamp.  There's no need to over tighten it.  Give it a few turns and then wiggle the airbox.  If it doesn't come off, then it's good enough.

Reinsert the two Allen bolts, make sure you didn't loose the spacer..

Now take your soft cloth and give the airbox a quick buffing

DONE!  Now, get out there and try it out!  I was quite pleased with the results from mine.  I'm able to lift the front wheel quite a lot easier than I was able to do before the installation of the filter.  Top speed is still a mystery though as I haven't taken the time to try it out.  It'll have to wait until the Spring.