blow-by

So my engine is further modified and has blow-by smoke and oil coming out of the exhaust. At first the engine had a HUUGE amount of blow-by you would swear James Bond him self came by with his smoke screen. So I used the governor hole as a vent,drilled it open just a tad more, and the...

Hello all, I was tearing down my gx140 today to get a a list going for my mini. So I removed the oil sensor and took the governor parts out. I noticed as i turned the crank there was air seeping by the piston into the crank case. i could hear it hissing. Is this normal for these motors or...