When you get your top end rebuilt, and you go to put your piston in the cylinder, should you just put it in, or coat it all in some sort of oil? What should you put in on yout connecting rod upper bearing? One more question, at the end of my crank-case breather hose, there is a little plastic plug with what looks like a tiny hole in the center of it. Is it supposed to be there? What purpose does it serve? I don't know if it completely blocks off the hose or not. Any answers would be appreciated. Thanks