I found that removing the seat and then using the hanger is a royal pain. Not to mention, my helmet seems to impede the key hole and is relatively tight up against the side. I have to put my hand through the visor opening to work the key. I think a cable lock, as Charlie pointed out, is probably a good alternative. Or do what the Harley guys do and just hang the helmet off the handle bars for anyone to knock off or take. Because it's cool to do that...you never see anyone on a harley with a FF helmet, why?