Hello. I have a 1964 C92 Benly that I am using as a vintage race bike. Can any of you smart guys tell me how the oil gets from the cylinder head back down to the sump? I had new valve guides installed and the engine is burning oil like crazy. The backs of the valves are wet so oil appears to be coming down the guides. Is there any possibility that the cam box is getting filled with oil and not draining? There is a plate on the end of the camshaft that prevents oil from draining out of there down the timing chain gallery. Thanks for any ideas.