Hi I just purchased a 1985 ytm 200er and my first ride i noticed it was leaking oil from around the cover for the magneto. i also noticed i can feel air coming out around the cover My question is, does that mean I'm getting too much crank case pressure and blew the seal and getting oil on the magneto side? or is there supposed to be oil on the magneto side and it's just a blown gasket around the cover. thanks