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  1. #1

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    95 polaris slx 780 reed valve question

    Hello, Ive been having some problems with my SLX, one of the pistons was not getting enough lubrication as the others. I took out the reed valves and noticed that the reeds of the piston that im having problems with are totally closed. I checked the other two valves and one side is slightly opened and the other it totally closed.

    My questions are as follow:

    1. Are the reed valves supposed to be slightly opened from one of the sides or they have to be totally closed?

    2. If one side is opened, where does the opened side have to point to up or down, and how much do they have to be opened?


    All responses will be gladly taken,

    Thank you for your attention

    Roger


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Welcome to the Hulk Roger.

    Your reeds should be closed. Even though the book does say they can be open about 10 thousandths.

    They are like a one-way check valve.

    They open to let fuel into the engine case, and snap shut to seal the engine air tight until the next revolution.

    Why do you think 1 cyl didn't get lubrication while the other 2 did?

    Got any pics to post up?

  3. #3

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    So both sides of the reeds should be closed, ill check and close all of them. Also I was wondering if i should replace my reeds because they are 15 years old already or should i keep them? Your question is smart, im stilll wondering why only one piston doesnt get lubricated and the others do. Im going to check the carbs to see if they are clean.

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Yes, both sides should be closed. Although, after years of service, they will start to "wear"

    Stock reed petals CAN be flipped over in order to shut them, but most aftermarket reeds CAN NOT!!!! They will break rather quickly.

    Honestly, if they are that old, I would replace them.

    If you have 1 cyl that truly isn't getting oil, it can only be the oil hose or filter to that cyl.

    All cyls are fed oil from the same oil pump, and go directly into the fuel system via a check valve, that's it.

    How about a pic, because alot of guys think it's an oil problem, when in reality, it's a fuel (or lack of) problem.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by xlint89 View Post
    ...If you have 1 cyl that truly isn't getting oil, it can only be the oil hose or filter to that cyl...
    I think you meant to say 'or the check valve'

  6. #6

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    Alright well ill try to close them, but Ill probably change them because they look like if they wont last that much. Im running my jet ski on premix, i dont have an oil pump or tank. I dont know if that can cause any problems. Ill check the fuel lines that they are not torn or ripped. Ill try to upload some pics of the reeds so you guys can tell me what should I do with them.

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by K447 View Post
    I think you meant to say 'or the check valve'
    Oh yeah, forgot there's only 1 filter, not 3 seperate.

  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Premix won't cause any issues at all. You'll need to just add a little more fuel to the carbs via the high speed screw once you're back up and running.

  9. #9

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    Alright thanks for the tip, ill check the high speed screw when i get it working

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