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Thread: Plug Life

  1. #1

    Join Date
    Apr 2007
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    Plug Life

    I am on my second set of plugs and need to change again. I am only getting about 10 good hours per set. How many hours are other people getting on their plugs?


  2. #2
    blownhotrodder's Avatar
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    Changed first and only set at 17hrs. Im at about 30 right now.

  3. #3
    nighttrain nighttrain's Avatar
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    Quote Originally Posted by blownhotrodder View Post
    Changed first and only set at 17hrs. Im at about 30 right now.

    I bought my first pair and paid 75.00 dollars, wow, I was going to change at ten but no longer due to price, I'm going to wait till 50 hours if they last. I'll keep ya posted.

  4. #4
    blownhotrodder's Avatar
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    You should be able to find them for alot cheaper. Dealer probably is the highest.

  5. #5
    Tightening torque to the factory spec on 250's plug (NGK PMR9B) is super-important. Over-torqued plug is usually broken at the core inside the ceramic insulator (but the ceramic looks fine inside). And you can guess where some of the unburned gas will go - GIO. Don't use the built-in torque wrench in your arm (which has never been properly calibrated). Use the real one and set it to 9.4 ft-lbs. If your torque wrench does not read < 10ft-lbs, you will need to get a finer in-lbs one and the torque spec is 113 in-lbs. Plugs will last 50+ hours if you follow that.

  6. #6
    2005 RXT Red08Ultra250's Avatar
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    Feb 2008
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    Dunedin, FL
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    changed mine at 10 hour service. Still good at 47 hours.

  7. #7
    nicjak's Avatar
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    still got my originals at 38hrs had them out a couple of times to check them and have always torqued them up by feel no problems here and i always carry a spare set on the ski just in case. (i was given the recall ones but haven't yet had the need to install)

  8. #8

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    I have always hand tightened (no torque wrench) all my plugs but maybe these are more sensitive so I'll try the wrench. The color of the plugs looks good. No rust, etc. Just a rough running engine that won't idle. A new set of plugs seems to take away the problem. At least for a little while!

  9. #9
    TangorZX's Avatar
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    Spring, TX
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    On my '08 the dealer has changed them at every oil change interval. I never noticed any performance drop off prior to the change. When I asked them why, they said Kawasaki advised them to. I have a 3yr. prepaid maint contract that I purchased when I bought the ski. I'm currently at 50hrs and counting since purchasing in June.

  10. #10

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    I see plugs fail at different intervals on all makes. Factors are rider habits, weather, fuel, application, and issues [GIO,etc.] causing subsequent failure. 25 hrs. is warranty cut-off unless maintenance pkg. or other failure causes failure [piston contact,etc.].

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