I am not talking about heat. I am asking about lubrication.
like the doc said, as long as your lubrication system is in working order, it does not matter if the bike is upright or on the jiffy stand. The system is closed and pressurized, if you have the proper amount of oil and there are no leaks, warming up the bike on the stand is not a problem. Extended periods of time sitting idling is not good for any air cooled engine.