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Zl600 still overheating

Eugene Keller Sep 25, 2019

  1. R. J.

    R. J. Supporting Member

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    :hello: What kind/brand of thermo stat are you using. You can test it by boiling water to see if it opens.
     
  2. Eugene Keller

    Eugene Keller New Member

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    Not sure on brand but got 3 stats all test out ok
     
  3. Eugene Keller

    Eugene Keller New Member

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    No pods original airbox. Plugs are ngk dont remember what # but dealer cross ref them
     
  4. prfixer

    prfixer Senior Member Supporting Member

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    And you’ve tested the radiator to be sure it’s actually flowing?
     
  5. Eugene Keller

    Eugene Keller New Member

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    Yes I did .
     
  6. Trojan441

    Trojan441 Well-Known Member

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    I was talking about the Main hose provision not the overflow bleed hoses! The situation sounds like either an air-lock or the fact that the engine is at fault; timing is wrong or the mixture is excessively weak and the engine is producing too much heat n' the cooling system is being over-whelmed. The small 4's do run hot n' that is not a surprise as everything is so crammed in together. Spark plugs for the earlier "A" series are NGK DR8ES or Nippon Denso NDX27ESR-U. Next thing to do is check the mixture n' perhaps that the carb's have the right jets in them! Is the water-pump worn could coolant be passing backwards through the rotors through wear?
     
    Last edited: Sep 29, 2019
  7. Ed

    Ed Well-Known Member

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    Trojan441, I thought it was a mistake but after checking, I see the resistor plugs DR8ES were used for non- US models. Most shops only stock the resistor types because that's what all bikes eventually went to. Sadly, parts guys will insist they'll work fine and are reluctant to special order the right ones.
     
  8. R. J.

    R. J. Supporting Member

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    :hello: EUGENE said: Not sure on brand but got 3 stats all test out ok. What are the 3 thremo stats that you have rated at. Is one of them OEM.
     
  9. Trojan441

    Trojan441 Well-Known Member

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    The Spark plug recommendations came out of the Kawasaki manual, sorry for the USA it states NGK D9EA or NDX24ESR-U or NGK D8EA or ND X24ES-U. In the old days your engine spark plugs used to show up on the TV screen, hence they insisted on suppressed plugs!
     
  10. Ed

    Ed Well-Known Member

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    In US, we have resistors in the caps instead of plugs. I would replace the resistor with a slug of copper and just use the DR8 if they are questionable.

    Do you guys have both resistor caps and plugs? Can't easily pull up part numbers for other regions. It's easy to check if you can unscrew the spark plug contact. A resistor and spring should be in there. If there is one please measure the resistance as I would expect it to offer no resistance since you already have the radio noise supression built into the plug.
     
    Last edited: Sep 29, 2019
  11. Eugene Keller

    Eugene Keller New Member

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    I check again it wasn't flowing good took it off and flushed the hell out of it, but looked inside and could see still plugged up. So I ordered a different radiator of Ebay only place I can find one.
     
  12. 87kawzl

    87kawzl Supporting Member

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    A rad shop should be able to "boil" that out for you.
     
  13. Eugene Keller

    Eugene Keller New Member

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    Ya thought about that but it's in ruff shape. Bunch of fins are bend and broken. Just easier to replace it
     
  14. R. J.

    R. J. Supporting Member

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  15. Eugene Keller

    Eugene Keller New Member

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    Would like to thank everyone for you Input, Knowledge. I believe I solved my problem. New radiator drove 60 miles and about 10 miles riding her hard, no overheating
     
    Eastwood, 87kawzl and Trojan441 like this.
  16. R. J.

    R. J. Supporting Member

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    :hello: We are here to help out fellow MEMBERS. That's what we do. :notworthy:.
     

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