RE: 4 stroke engines
MAgnum RFS ships with a nipple on the intake manifold, which is intended to be used as a "PCV" cnnection, but they don't always put the tube on for you...
Run fuel line from the PCV connection on the manifold to the crank breather near the engine's crankshaft bearings.
I SHOULD have thought of this... Not all 4-strokes have it, and somehow I managed to forget about it.[&:]