The dealer is very unlikely to do anything but put factory parts into the bike with the specified methods (in this case, nothing but a few dabs of RTV sealant at the cam seals).
But it is the method I chose to address the problem; I brought the valve cover into the laundry room and scrubbed it clean with a brush using soap and water until it was CLEAN. Then squeezed a bead of about 3/16" into the seal valley on the cover, then put the seal in and sat the cover onto the seal on a flat surface. Let the RTV set up and reassemble. It worked for a long time in my case and was noticeable when reassembling in that the valve cover screws drew- down for more distance and somewhat harder than with a stock seal.
Of course there is the risk of using too much RTV and having too much resistance screwing (Easy Boys!) down and doing some damage, most probably cracking the case al. cover.
It is a less- than- great design which is disappointing because Japanese vehicle mfg.'s are particularly good at making vehicles (and showing the world how to make vehicles) that DO NOT leak. Then again, if something has to go chronically wrong, better a weeping valve cover gasket than, say, weak piston crowns or bad output bevel gears, etc.
Brian
I have the famous MOB O-ring but my valve cover is definitely leaking. I've decided to pay the local dealership to do a valve adjust and of course they will put in a new valve cover gasket. If I were doing it, I would probably put a little bit of black permatex on it to make sure it does not leak again. Wondering if I should ask them to do that.