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Maxim-X 750 chirpy intake noise

Discussion in 'XJ Technical Chat' started by iX., Sep 27, 2015.

  1. iX.

    iX. Member

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    Just curious if anyone else has a lot of intake noise with their 750X? I get a fair bit, varies in frequency (it's a pulsing noise) and pitch with RPM, doesn't happen under lift or extremely light throttle but fairly noticable under medium throttle.

    I'd like to minimize or eliminate it... Any thoughts on that?
     
    iX., Sep 27, 2015
    #1
  2. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Vacuum leak somewhere?
     
    chacal, Sep 27, 2015
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    rocs82650 likes this.
  3. iX.

    iX. Member

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    Hmm hadn't thought of that. What vacuum lines are there on these things? Could it be the boots between the air cleaner and the carbs maybe? They aren't perfect but I didn't think they would leak.

    I have no idea how to go about diagnosing a vacuum leak on a bike motor. :oops:
     
    iX., Sep 27, 2015
    #3
  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Unlit propane torch. When the idle increases you've found the leak.
     
    k-moe, Sep 27, 2015
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  5. quebecois59

    quebecois59 Well-Known Member

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    It could be one of your carb vacuum port rubber plugs that is cracked, causing a vacuum leak.
     
    quebecois59, Sep 27, 2015
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  6. iX.

    iX. Member

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    And when your garage explodes you should give up smoking... jk

    Will do next weekend.

    Sounds reasonable, I'll check for that. Thanks guys.
     
    iX., Sep 27, 2015
    #6

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