I am not sure how they mount them but have seen a couple F6B with a Harley Davidson Ultra trunk on them. Looked pretty good. I would steer clear of the ebay $50 - $100. trunks. Very light weight and I would not want my wife leaning up against one of those. Aftermarket I think maybe a Givi. better built than most. Several size options also. You can get the mono key mount and make it detachable.