Is there any harm to storing a quad on end ( vertical on rear tires with nose in the air).  Friend needs more space in his workshop.  Has zilla, banshee,, and honda 400.  I dont know if if it would have any adverse effect with the fluids moving there they do not normally go.

I have the same issue, I store my trx250rs, ltr450 vertically. The banshee will drain it's gearbox oil out... Dont ask me how I know. 

I remember seeing a member on the old site that stored several quads vertically, no problems.
Just make sure you shut the fuel off or the carb might leak fuel all over the place.
If the crankcase leaks oil, re-position the vent line higher up.
No harm in storing a quad like this so long as the fluids don't leak out.

I've seen guys load 6 on a 3 bike trailer, all standing up and hauling out to River Ranch for the Lake Wales Mudfest. Seemed a bit scetchy to me, but whatever works I guess!