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With full lean and the jet it's still rich if we drop to a 310 with needle all the way up its to lean

so I have a fully built KOR built blaster fully drag ported, shaved head, 240 Vito's big bore bored to 73.00mm, +3 Vito's stoker crank, v-force 4 reeds, lightened fly wheel, advanced timing by 4, RDZ big bore drag pipe. I'm having a issue getting it tuned thinking i need a bigger carb I have a...