The leak you are referring to is the infamous Savage head leak. There is a rubber covered metal plug that fits into the access hole for the right front head stud nut in the air cooling tunnel portion of the head. what happens over time is the rubber loses its resilience and oil starts to seep into the cooling tunnel, causing oil to spattered on your battery box and muffler guard.
I think it was 2003 that Suzuki came out with a redesigned plug that looks more like a rubber stopper than the older thimble type.
Several months ago I replaced it on my 1987 Savage, now it doesn't leak.
If it needs to be replaced, figure on a couple hours labor, the plug costs around $7.50. If it isn't leaking, then your bike may have the newer plug or if the older one, may start leaking some time later. I wouldn't worry about it, if it happens then you'll know why. If you do your own wrenching, it is relatively simple task.
Also I believe your seat is improved over my 1987, I can only stand the seat for about an hour. Thus I'm looking for a replacement, which will most likely be an Intruder seat, as these can be had in E-bay for a nominal cost. However as with any nonstandard part, it will have to be adapted, I'll cross that bridge when I get there.
- Laters, George