Here is my new (to me) R3 with all the Corbin stuff on it. Te previous owner went Corbin crazy, he installed a Corbin batwing fairing, heated seat, saddlebags and of course the trunk. The trick is that the trunk is not made for the classic, only the touring as BillyIndiana pointed out. The guy solved the issue with his hinge system. Someone asked me to submit some pics on how it worked so here you go (not sure if the pics should be thumbnail or full)
. As you can see in the pics the saddlebags won't open completely as the trunk is in the way, so the trunk needed to be able to move out of the way. I think he used the key switch from the original seat (maybe). I am sure you can see where the key goes below the trunk, this releases the lever to allow the trunk to hinge down. Inventive solution by the previous owner.