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  1. #1
    woodsrider40's Avatar
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    98 XL1200 Yamaha pop-off pressure

    I'm trying to find the ideal pop-off pressure for this 98 XL1200 non power valve motor. I put new 1.2 needle and seats back in, did pop-off reading around 72 psi which I thought it was kinda high. I have read mix review on different settings but I just wanted to keep it stock and right. Complete rebuild motor. I've done a lot of Seadoos but not Yamahas.


  2. #2
    Myself's Avatar
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    The 65u was never "right" in stock form anyway. Do the drilled returns mod for fuel pump check valve reliability and shoot for around 55psi popoff if you're leaving everything else alone.

  3. #3
    woodsrider40's Avatar
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    How do I go about the mod ? Link how to ?

    Thanks

  4. #4
    Yamaha artisan Cutlass's Avatar
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    Quote Originally Posted by woodsrider40 View Post
    I put new 1.2 needle and seats back in, did pop-off reading around 72 psi which I thought it was kinda high.
    Thatís about right where they are supposed to be with from the factory with a 1.2 NS.

  5. #5
    Myself's Avatar
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    Drilled return mod and other good info.

    http://greenhulk.net/forums/showthread.php?t=228557

  6. #6
    woodsrider40's Avatar
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    Thanks you guys !

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