Install a new crankshaft, piston, and rings. Did a leak down test and was all good. I noticed large amounts of what seemed to be carbon where the head pipe meets the silencer as well as black shit from the silencer. Drained the oil and it seems a bit darker than it was. Still the same amount of oil. Could there be a leak between the crank compartment and the gear box? How can I know if this is correct. I though maybe the black carbon was from the rich mixture I was using to break her in? Is it normal to have lots of black carbon at brake in. Plugs are brown. What the easiest way to tell?
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