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  1. #1

    Honda Backfire please help!

    Well this is my first ever thread/question.. i have a 2004 r12 with 91 hours on the clock. this past sunday i started my ski and while idleing there is a very heavy clack/thud as if the motor mounts are bad almost like the engine is hitting the hull. also when rev limiter is hit when out of water during a jump for a brief second there is a loud backfire out of the rear exhaust. i make best effort to let of when im out of the water its not like i hold down the throttle the whole time does this sound like a plug issue or is there something i'm missing.. still original plugs.. please help..thanks


  2. #2
    JRINJAX's Avatar
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    Try a new set of plugs [about $10 a piece at Advance Auto Parts].

  3. #3
    i will i figure ill just buy the same ngk's but all my partial and full throttle seem ok. but that will be first thing i do. thanks and ill kep ya posted

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