Thanks Richard, looks like I will be sourcing some valves!  -- Ian

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Ian,
the OMP varies the amount of oil going into the valve. The valve is
actually a mini intake manifold in parallel to the main intake manifold.
When the rotor sucks the mixture in through the manifold, some of it is
going through the little vacuum hose and the little hole in the rotor
housing picking up what oil the OMP got into the valve. This oil is misted
into the combustion chamber.
If you have no valve, the droplets of oil will only produce an oil sweat
at the exit in the rotor housing and not doing anything. Sorry!
I hope I was able to clarify this.

Richard Sohn
N-2071U