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150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum |
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looks like i'm going to be building my engine i'm probably going to try to go all out get the 62mm big bore kit, stroker crank, going to put a cam in and upgrade the head but my question is, i see there are performance heads for sale, is there an advantage to these rather then port and polish on the stock head?
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