Jetting question

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12-08-2009, 12:39 PM

cdilbeck

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Jetting question

Hey guy i have 2005 400ex and i just got a slip on for it im going to take the air box lid off anyone have know where to start with the main jet it already has a 42 piloit jet in it just need the main thanks

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12-08-2009, 04:22 PM

tramp

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General rule of thumb is 3 sizes up and work back if you do any engine of exhaust mods.

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