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quick question...

Discussion in 'XJ Technical Chat' started by low-1-5-0, Aug 18, 2008.

  1. low-1-5-0

    low-1-5-0 Member

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    ... if a petcock was stuck on "prime" would this cause the bike to loose power at higher RPM's, but run OK at lower RPM's?
     
    low-1-5-0, Aug 18, 2008
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  2. osage

    osage Member

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    No, it should not.
     
    osage, Aug 18, 2008
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  3. Zookie400

    Zookie400 Active Member

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    i have been running mine on prime because it leaks in the other positions, i havent had any issues, and in theory it couldnt cause that problem.
     
    Zookie400, Aug 18, 2008
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  4. bluepotpie

    bluepotpie Member

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    I'm not the best person to answer this, and if i'm wrong i'm sure someone will correct me but maybe if part of your petcock was clogged it could happen.
     
    bluepotpie, Aug 18, 2008
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  5. Altus

    Altus Active Member

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    No - petcock won't cause that behaviour. But incorrect carburetor settings will - likely the main jets are too small, and/or the air jets as well. Have you done any exhaust/intake mods?
     
    Altus, Aug 18, 2008
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  6. jeepsteve92xj

    jeepsteve92xj Member

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    I agree with the possible clogging either at the screen, in the petcock, in the fuel filter or in the carbs
     
    jeepsteve92xj, Aug 18, 2008
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  7. low-1-5-0

    low-1-5-0 Member

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    problem I was having was with my GSXR, petcock is similar to the one on my Maxim... found what the problem was, and it was the petcock... the vacuum port on it wasn't working right and fuel was flowing out of it no mater what position it was on (on / reserve / prime), the diaphragm was on upside down blocking the vacuum port, took it apart, flipped it around and she purrs like a kitten :D , and the flat spot at the high RPM is gone... :roll: :lol:
     
    low-1-5-0, Aug 18, 2008
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