Re: puch polini 4 petal porting ??

Flagrant - /
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Yea I was going to say that some of this radical overlap transfer to exhaust timing is OK because while combustion pressure is high in the cylinder it pushes/holds the primary charge in the transfers until pressure is relieved through the exhaust and developing suction from the pipe to then let the primary charge into the cylinder less by port timing but more by pressure timing. Definately a high rpm move

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