As the above, a new seal will go a long way.
That is the design, no reason to worry about it. My one IS at 69K miles is leaking a little. I'll try to fix it before selling.
But if you are one to worry, there is a modification done to the GW GL1500, but again, it isn't a problem that needs to be fixed, so it is more just a waste, but some like the idea of fixing it.
http://goldwingdocs.com/forum/viewtopic.php?f=14&t=19760I have not heard if it has been modified to work on the Valkyrie, but have never followed up with it, as I'm not interested if it for my Valk.