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What are these deposits on my intake valves?

  1. 06-16-08, 03:05 PM #1
    keeena
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    What are these deposits on my intake valves?

    While I had the TBs off I noticed these deposits on my intake valves. They looked like a grey/off-white sand (almost like salt crystals). Deposits were only significant on this 1 cylinder, especially on the middle valve right next to where the valve seats. What kind of deposit is this? Abnormal and/or a result of a condition which I should look at fixing? Worth putting some valve deposit cleaner thru a tank of gas?

    Bike is an '06 FZ1, 5k miles. Pic sucks, I know.


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  2. 06-19-08, 10:16 AM #2
    keeena
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    Re: What are these deposits on my intake valves?

    Sooo...normal then? Did I pull a Firefly?

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  3. 06-19-08, 01:04 PM #3
    stoinkythepig
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    Re: What are these deposits on my intake valves?

    Those are probably octane booster residue. Run a tank of Techron treated fuel through it and they will go away, for awhile. If you can run lower octane fuel without issues, that will help prevent them from forming.

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