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Jet Sizing 2003 400EX any help appreciated!

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Old Feb 6, 2013 | 12:57 AM
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Default Jet Sizing 2003 400EX any help appreciated!

Hello all,

I recently acquired a 400EX and I have a few jetting inquiries. I ride in weather anywhere from -30 - +30 celcius. I want a safe set up. I'm not looking to break any speed records!

I was considering the 42 Slow Jet but I'm not sure about main. The bike is pretty much stock other than a K&N. I don't mind if the bike runs a little fat.

Any help would be greatly appreciated. Thanks in advance!
 
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Old Feb 8, 2013 | 04:26 PM
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Nice forum
 
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Old Feb 8, 2013 | 04:59 PM
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From: Gardner ma.
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155-160 main depending on elevation, temp.
 
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