I have heard different theories about this.
Years ago a job that I had was to build Army portable bridge transport trucks. After building and testing them we prepared them for long term storage and was told they would be placed on wood blocks to keep from getting flat spots on wheel bearing races. Sounded bizarre to me but I suppose it could happen.
One thing that I do is put a kickstand pad under it. I heard that you need to prevent the metal of the kickstand from contacting the ground to stop the oxidation of aluminum and corrosion especially with steel fasteners to aluminum parts.
Anybody know if there is any truth to these steps?
first thing i do is put Stabil in the tank and run it for a few minutes. Then I jack up the bike, or at the very least put wood between the tires and concrete floor. Put wax on chrome parts, but don't buff it off. Finally put a battery tender on it.