Motorcycle Questions? Ask a Mechanic.
why would you do this? There are moving parts in there, slinging the oil all over, DOING THEIR JOB! Of course you will get oil out the hole.
I understand what he is saying, thinking that if the rings are worn that crankcase pressure would build up and spray oil out- but you have to take into account the moving parts in there too. Take a look with the engine not running, and see if you have any kind of baffle that would keep oil from slinging out with the engine running, or if there are spinning parts directly under the cap.
There's always another buyer...