Jeff's winter storage advice.
Note, this has worked for ME, in WI (winters that are very frigid) for the last 10 years or so...
1. FILL the tank with gas. Absolutely full. No 3/4, etc. You don't want air space for condensation to get in and rust the tank.
2. Add fuel stabilizer (wal-mart, sta-bil brand works fine) per directions on the bottle
3. Run the bike for 15-20 mins to get the treated fuel through the carbs/injectors
4. Ensure you have anti-freeze in the bike if you're in an area that will freeze
5. Park the bike on stands or on a piece of plywood (I don't know why, I just do this...)
6. Put steel-wool in the openings of the ram air, exhaust and anything else a mouse might want to nest in (mice hate steel wool)
7. Attach a battery tender or use a trickle charger at least monthly
That's it!
People also recommend changing the oil so the acids of the contaminated oil don't harm the motor. You can take or leave this... It's not a big deal to me.
As mentioned, DO NOT start the bike unless you plan on riding it. You will do more damage to the battery and headers than good since the battery doesn't charge at idle, and the headers will collect moisture which will rust.
Now, these are MY instructions. I've used them forever, and have NEVER had a problem come spring.