1981 cb750f oil from stator cover

Hi guys, recently picked up my first bike. It has some flaws, and the first thing i'd like to sort out is a small oil leak from the stator cover.

First of all, should there even be any oil in there?

If not, I assume there's an o-ring inside somewhere that needs to be changed, which again means I'd have to split the block. Correct?

If oil is supposed to be in there, I guess all I need to do is get a new gasket and make sure the new one is properly sealed.

no oil should be present but not that bad

remove the rotor and there is a seal on the crank

change it its part number 10 here

http://www.partzilla.com/parts/search/Honda/Motorcycle/1981/CB750F+A/CRANKSHAFT+%2B+PISTON/parts.html

thanks cxman!