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Crf450 04
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Posted by: DirtAddict---------------------

Hi everyone, I put a yoshimura slipon on my bike and it seems to run great(idle adjustment) I pulled my plug today just to see whats going on and it is grey. To me(and my manual) this tells me it's running lean. My dealer tells me that they have been putting on complete white brothers racing pipes with no jetting changes because they come from the factory rich. Shouldn't the plug be tan in color(my dealer tells me thats old school that they dont run that color anymore because of new fuels and such) What adjustments should be made if any? Confused by conflicting opinions. Thanks :flame:

Posted by: GREENBEAN---------------------

Can you post a Pic? Was this a plug cop test or did you pull it just after a ride. Do you get any popping while the bike is in neutral and revved up a little. how many turns out is the fuel screw?

Posted by: Rich Rohrich---------------------

This thread has some useful info on reading plugs :

http://dirtrider.net/forums3/showthread.php?t=92818

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Crf450 04

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