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  1. #1
    mike1706's Avatar
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    Smile how do i clean my power valve?

    I got a gp1200r I was wodering if somebody could help in this. I need to clean my power valve in my ski, some mechanic told me that i need to take the three lid out, then spray power tune on each valve let sit for a while, then put all three valve cover back and turn on the jetski run at full thrttle for 5 minutes and all the carbon on the valve has been cleaned pls tell me if that correct to do it.


  2. #2
    Moderator OsideBill's Avatar
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    Never heard of this method. Book recommends pulling them out and scraping the carbon off. You will find that under the caps will probably be quite a bit of sludge, remove all of this that you can do not wash this down the cylinder.

  3. #3
    Moderator RX951's Avatar
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    welcome to the forum. As Bill mentioned about the sludge, you will find that once you remove the power valve cover, especially if the motor has many hours on it and has been run on Yamalube, there will be sludge built up in the cavity where the powervalve linkage is.

  4. #4
    yz450f's Avatar
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    while your in there buy yourself a set of wave eater clips to prevent your powervalves from siezing your motor

  5. #5
    Greenhulk Grasshopah (DRC) HallPass's Avatar
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    Quote Originally Posted by yz450f View Post
    while your in there buy yourself a set of wave eater clips to prevent your powervalves from siezing your motor
    the wave eater kits just help prevent the powervalve from dropping and hitting your cylinder.. seizing is when the piston like begins to melt because there is no lubricant between the cylinder wall and piston

    you should still do this, PM the moderator OsideBill ask if he has any RPM couplers

  6. #6
    yz450f's Avatar
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    yea but if the powervalve falls in cant it cause major motor problems??
    either way its a good investment

  7. #7
    Greenhulk Grasshopah (DRC) HallPass's Avatar
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    Quote Originally Posted by yz450f View Post
    yea but if the powervalve falls in cant it cause major motor problems??
    either way its a good investment

    yup. It can screw stuff up, if a chunk of metal gets nicked off when it hits the piston going like 7k rpm and a chunk of something gets up by the piston.. possibly replace the piston, might reck the head, powervalve will need to maybe be replaced..

    its a good thing to do

    replace the clips and couplers.

  8. #8
    mike1706's Avatar
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    were do i could buy those wave eater and how they look like

  9. #9
    Moderator RX951's Avatar
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    welcome to the forum Mike

    They are available in the online store
    http://www.4-tecperformance.com/inde...word=waveeater

    Clips



    Powervalve Couplers

  10. #10
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by mike1706 View Post
    I got a gp1200r I was wodering if somebody could help in this. I need to clean my power valve in my ski, some mechanic told me that i need to take the three lid out, then spray power tune on each valve let sit for a while, then put all three valve cover back and turn on the jetski run at full thrttle for 5 minutes and all the carbon on the valve has been cleaned pls tell me if that correct to do it.
    I would never run a ski wide open on the hose for 5 minutes, Big chance of blowing it up.

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