Check out this thread Seth:
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1099227295. Sounds like you may have the cylinder head plug/cap leak. Thanks to those on this forum who posted this information, we have a diagnosis. I'm not saying i'm 100% sure that you have the same problem, but there is a good chance.
The oil gets on the fins by running down from the cap/plug (not spark plug). Also, wipe the bike down and go for a ride. Bring it back home, park it and look at the left side of the fins for oil. Then, walk away for 30 minutes, come back and look at the left side of cylinder fins again. When the bike is tilted to the left on the kickstand, the force of gravity will cause the oil will run down the left side. Is it a PITA? Yes, but more of an annoyance than a danger to your motor. I have the same thing, and will take care of it in the winter. For now, only a few good months of riding left in the Northeast, and I'll spend them riding not wrenching.