what size jet

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03-29-2004, 08:28 PM

thurmonator

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what size jet

i got a 2003 400ex. i put a slip on FMF megamax. i was thinkin i should put in a 152 jet. im not to sure what is best tho?

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03-29-2004, 08:41 PM

shadetree101

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what size jet

do a search on jetting. also it all matters on what sea level you live at.

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03-29-2004, 08:43 PM

fidge1

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what size jet

With a slip on I would only go up 1/2 or 1 size. If you are doing air box mod then maybe go up 1.5 sizes

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