what size jet for piped 400ex

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04-02-2006, 10:24 PM

OneWheelWheelie

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what size jet for piped 400ex

what size of jed should i use if i have a powerecore 4 slip on and uni air filter should i take the air lid off

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04-02-2006, 10:30 PM

TractorPacker

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what size jet for piped 400ex

You will gain more power with the lid off, or holes drilled. If the box is opened up, depending on a few things most 400ex's are between 160-170 main. If you leave it sealed up, 150-155 would be more likely.

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