About every 5-10 minutes after the engine is good and warm I get a small drop of oil drip right on the exhaust. It appears to be coming from the very top of the motor. Do I need to replace the top end gaskets? Or is this more serious? It burns no oil, just this annoying drip.

 

It would probably be coming from the head cover. I don't think there are any gasket to be changed there, I could be wrong though. You could take the cover off and put some suzuki, honda, or yamabond on it. I have been using Indian Head shellac and it seems to be working alright.
Hopefully it is not warped.