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What are these deposits on my intake valves?

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Old 06-16-08, 03:05 PM
High maintenance priss
  
Join Date: Jun 2004
Location: Central MA
Age: 29
Posts: 504

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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Old 06-19-08, 10:16 AM
High maintenance priss
  
Join Date: Jun 2004
Location: Central MA
Age: 29
Posts: 504

Re: What are these deposits on my intake valves?

Sooo...normal then? Did I pull a Firefly?
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Old 06-19-08, 01:04 PM
stoinkythepig's Avatar
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Join Date: Dec 2002
Location: Raymond NH
Age: 42
Posts: 1,807

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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