Jetting question

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Dec 8, 2009 | 12:39 PM

cdilbeck

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Weekend Warrior

Joined: Apr 2009

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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

Dec 8, 2009 | 04:22 PM

tramp

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Joined: Aug 2007

Posts: 414

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From: Wyoming

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

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