I have used the sissy bar style on a my bikes. Simple, not fancy or cheap, but effective. Depends how creative you are in finding a place to mount it. They zip tie mount and the flag and pole(1 unit) screw into the mount.
Cost effective - great quality flags as well.
I will see if one will fit on the F6's passenger sissy bar.
I'm no spokes model
http://store.sspflags.com/vehicle-flag-poles/
Jim
4 Wheels Move the Body
2 Wheels Move the Soul
In Loving Memory of My Brother
"Death Waits In The Dark"
2013 F6B Deluxe
Whatever you decide, make sure the bottom of any flag does not "flap" against the paint job. Consider getting that clear film to apply in the area if it does or you'll be sorry. I had a heck of a time polishing out my husband's 2005 wing after a small antenna flag beat it to death.
Please don't spook the road-sheep.
No harm, no foul.
It has happened to everyone on every forum sooner or later.