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Read my plug **PIC inside**

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I did a race in snow flurries the other day and I'm jetted for 70+ degrees. I richened up the fuel screw but didn't re-jet for the colder temps. When I pulled the plug, it was obviously black and sooty but there is a small part of the porcelain that is white and the ground electrode is whitish. It seems like a conflict in principle. Am I correct to read this plug as too rich?

Plug.jpg

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I say too rich, I like to see more light tan/white around the electrode and more of a brown around the rim. Your head's gettin' carboned up like that.

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Depends on the fuel. If you run pump gas, you are wasting your time trying to read the plug. The additives in it make it near impossible.

When reading a plug, you do not read it at the tip, you read it at the bottom, where the porcelain meets the shell. So if you are running a race gas, your bike is rich. If you are not running a race gas, you have to go by the seat of your pants, 'how does it perform?'

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