Originally Posted by LukeMacPU
How do I check them? Am I just looking for leaks while I'm in there for the timing belts?
easiest to say, is that if you don't see a leak from the belt cover, because it's not completely sealed itself, then your seals aren't leaking yet. I only mention it because it's a 30+y/o bike and you don't know the maintenance. Just a recommendation.
Here is another GW forum. http://www.goldwingfacts.com/forums/