I have a F6B and I would not trike it.
I would want reverse on a trike
But I would think you could put a F6B kit on a Goldwing.
I didn't like the Hannigan trike for styling, The Motor Trike "Raptor" version was cool.
Looked at those "2 wheels up front" kits. The only one I thought was interesting was the leaning version, The Trio from Tilting Motorworks was pretty cool.
www.tiltingmotorworks.comRams