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XpavR79

MT-07 White Exhaust Valves.

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XpavR79

Hi guys, when I was changing exhaust I saw that my exhaust valves looks odd. What do you think? Is it okey or should I be worried ? My first thought was I'm runnin too much lean mixture.

IMG_20210707_172247mm.jpg

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M. Hausknecht

Not unusual, in my experience. I'd check the plugs; they're  better indicator of whether the mixture is off. What mods have been done to the motor and have you done anything to alter the stock ECU's mixture?

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XpavR79

I changed exhaust, but will get tune when it will be possible due weather. From what I found on internet, this should be only indicating higher temperature of valves 'cause of factory lean mixture and probably is pretty common. I will check spark plugs anyway. Thank you

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shinyribs

Pretty typical on modern fuel injected engines. I wouldn't let it worry you. It more related to the additives in whatever type of fuel you run than a lean/rich fuel mixture. It's basically just fuel residue.

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XpavR79

Thanks man 🙂

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