3rd Street V-Twin Parts
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O-Ring Head to Barrel
- and -
Outside Oil Return

This will stop oil from going through head gasket into chamber.

* Stop blowing head gaskets *
* Stop fouling plugs *
* Stop Sucking oil *


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Barrel is surfaced.

Oil return is plugged top and bottom.

O-Ring groove is cut.
Heat shield or lip at top of barrel cut to crush in head.


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Oil return hole is welded shut.
Head is surfaced.
Oil return is plugged top and bottom.
Threads in head for head bolts are counter-bored.


3rd Street


Machine 1/8 pipe thread in head for outside return.

3rd Street
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