I went to the country this weekend and it was running fine then it died so I got it re started and it wouldnt idle so when I got back I checked the air filter and there was motor oil in the air box and its coming from vent tube that goes to the motor and when I get it started air is blowing out of the breather like the crank case is pressureized what would be causing this ?? I have a dyna tek cdi,k&n filter dyno jet kit and a 2" exhaust tip It ran normal when I got it going but there was more oil in the air box any help would be great