After the Ironman GNCC today, I had an engine noise, not terrible, but wrong. Layed it over two (several) times, once top end low, someone told me it might have stopped picking up oil. If so, whats the low down on this and does anyone know what is probably messed up? (Anybody's guess I'm sure) How much oil should be in the flywheel cover, and whats proper procedure for changing oil? will the drain plug change whats behind the cover?