<< What concerns me on the single rotor is what accommodation for an
expansion

chamber, oil breather blow-by is provided for.
George ( down under) >>

The stock breather that extends from the filler tube is about 3/8" and is
fine for the street. For racing that is replaced by blocking the stock port
and
installing a dash 10 AN male into the filler neck a bit higher up the tube.
For
dry sump breathers the filler tube is replaced with a plug that is tapped for
a dash 10 AN male.

 In any case increasing the diameter of the breather lines reduces flow
velocity and limits the amount of oil mist that can be carried away. If a
dash 10
is not getting the job done use a dash 12.

In the single rotor, put on a crank trigger and use the distributor hole for
the breather.

Lynn E. Hanover

Hi Lynn, I took your advise and installed a fitting for 5/8" hose through
the middle of the oil filler cap. Have not tested it yet at full power.
Bulent

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