OK guys I have been riding today, pretty hardcore. I have a .335 web cam, weisco .040 11:1 piston, .020 taken off the head, P&P, 4 angle valve job, hmf pipe and WB header. I stop to switch riders and see there is oil on the side of the engine, then i see the breather hose is right there. This is the breather hose that is comes from the valve cover. What is wrong, will get pictures.
edit: I have checked all gaskets, all fine.