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Info on building 270 shifter kart motor

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  • Info on building 270 shifter kart motor

    Hey guys I'm from Australia an we run a 250 shifter kart class on the dirt the tracks are a circuit not oval an I'm looking to build a really strong motor I've got two cr250 motors I'm thinking a 68x74 combo we can only go to 275cc pump gas 98 octane the rest is open so need sum advice it needs to be a stump puller with good top end as we have sum tight corners an sum long straights cheers in advance
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