1. Guest,
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Cleaning sludge off of top of pistons?

ARCHIVE_Elimax Dec 7, 2006

  1. ARCHIVE_Elimax

    ARCHIVE_Elimax Guest

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    Anybody have any tips re. what products/tools to use to removed the sludge (I believe it to be carbon buildup) from the tops of my pistons, as well as on the valves, of my 1985 ZL900?

    Thanks very much!

    Aaron
     
  2. ARCHIVE_Shlim1

    ARCHIVE_Shlim1 Guest

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    Just how much carbon are you talking about??
     
  3. ARCHIVE_Elimax

    ARCHIVE_Elimax Guest

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    About 1 to 2 mm thick, at most.
     
  4. To be honest, for that small amount, I would just leave it where it is. In the great scheme of things its actually very little, but if you feel that you must then go gently with a scraper and finish off with scotchbrite or those plastic pan scourers or similar. Make sure that you don't leave any big scratches in any of the surfaces, otherwise the metal that is scraped up (high spots) will create 'hotspots' Also watch out for bits of debris falling down the sides of the pistons and fouling the ring slots.

    KK
     

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