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Changing spark plugs

This is a discussion on Changing spark plugs within the ZR-7 Maintenance forums, part of the Kawasaki ZR-7 category; I'm curious, how often do you change the spark plugs on your ZR-7s. THe service manual says to check them every 3000 miles, but doesn't ...

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  1. #1
    Rising Star sf_frank's Avatar
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    Changing spark plugs

    I'm curious, how often do you change the spark plugs on your ZR-7s. THe service manual says to check them every 3000 miles, but doesn't say when to change them.
    "I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My life is my own." - No.6; The Prisoner

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  3. #2
    Maintenance Overlord graeme gould's Avatar
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    Hi sf frank,

    gg changes his plugs at say 20,000kms (12,000miles) for no other reason than habit, the old plugs are kept under the seat for a rainy day.

    Lady gg's car has "extended life" plugs which are changed at 50,000kms

    gg@bb, ava good day
    Graeme Gould at Byron Bay the most Easterly part of Australia

  4. #3
    Supreme Being Bronto's Avatar
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    With the plugs only lightly tightened. They come loose easy, around 3000 miles. At same time it's an opportunity to clean em up. Emery cloth sanding the electrodes. Brush clean up using carb cleaner. Before replacing, small amount of diaelectric grease on the connector and thin coating inside the boot.
    I replace around the 7 k miles. Clean at 2500 and 5000 miles.
    Found some Ebay sellers have best price on ngk plugs. If use the irdium plugs, can go longer before replacing them. Only clean with carb cleaner, no sanding.
    Alan - Green GSX1300R - Former Blurple Zr7sS rider

  5. #4
    Silver Member javasutra's Avatar
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    I would replace the stock Densos with NGK plugs at the earliest convenience.
    '02 ZR-7S Blurple - Traded for a:
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  6. #5
    Johnny Blue Lightnin'
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    Going from memory I changed mine somewhere around 12,000 miles.
    Jon

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  7. #6
    Up-And Comer Stpetezr7's Avatar
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    Plugs

    I replaced mine at like 14,000. Should have done it earlier, around 12k. Bike ran smoother, better throttle response, did it in conjunction with my valve adjustment. Just make sure to use a torque wrench, a cheap investment to prevent an expensive mistake! Even the cheap beam type is accurate, just not as easy to use.

  8. #7
    Rising Star sf_frank's Avatar
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    Thanks for the your comments. I think I change my spark plugs when I get to 12K miles. I'm at about 9500 miles right now.

    Frank
    "I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My life is my own." - No.6; The Prisoner

    http://www.xsrider.com
    IBA #14938
    ZR7OA Member#: 1462
    2003 ZR-7S

  9. #8
    Supreme Being chiller's Avatar
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    did mine at 12k then didn't do it until last thursday, so they lasted 40k and didn't look too worn either compared to the new ones...the color on them was just right as well..., just changed it for the sake of having new plugs for the new riding season...
    "Group rides are simple, we all go together, we all come home together"

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  10. #9
    Site Elder HiG4s's Avatar
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    I did mine at 10k, didn't really need it yet.
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