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wr450f 2004 jetting and color plug

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Hello.

here is a pic of my sparkplug.

my bike is a 2004 wr450 with full FMF powercore, totaly open airbox (remove battery so i remove the battery holder), YZ needle, 175 main jet and Grey wire unplug.

What do you think?  A friand tell me i'am on the rich side but i doubt...  the isolator is on the white side.

20170705_162146.jpg

Edited by David L.

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Impossible to tell with pump gas, multiple throttle openings. 

The only thing that matters is how it runs. 

...besides, you do not read the air/fuel mixture at the tip, you read it inside, at the bottom of the insulator.......

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ok thank you.  the bike run great, pull strong in the entire powerband and zéro Backfire.

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19 minutes ago, David L. said:

ok thank you.  the bike run great, pull strong in the entire powerband and zéro Backfire.

There you have it. You can proclaim yourself a master carb tuner.

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