4 Stroking at WOT after break in

Josh Estepp /
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So I just got my 60cc head kit broke in with a delorto sha 15.15 jet size 72 I believe. And at top end it 4 strokes almost every time. Once it is heated up does it less but still 4 Stroking WOT maxed out flats with high head wind(20mph) I'm getting 31mph. I am also running the pro circuit exhaust. Thanks in advance

JNoStepps

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