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  1. #1

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    Angry SLT 750 eating pistons!



    ARRGGGGHHHH!!

    I am on my third Piston in the cylinder next to the shaft. I am currently in the process of rebuilding my carbs. Any suggestions or help will be greatly appreciated.

    RT


  2. #2
    PolarisNut's Avatar
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    Is the piston melting, or is it another type of failure? If its melting, there are a few possiblities here...one is the carbs are plugged, another could be the crank seal on the PTO end is leaking, crank could be out of phase, airleak at base gasket or reed cage. When replacing a failed piston, you always have to find the cause, or you'll be repeating yourself again...they never melt down for no reason.

  3. #3
    ph2ocraft's Avatar
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    TX WELCOME to the Green Hulk Forums!!!

    Are you still using the stock fuel pump and are you burning a hole in the center of the piston?
    How about a photo of the piston in question?
    Wild guess is you need a triple outlet fuel pump.

  4. #4
    PolarisNut's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    TX WELCOME to the Green Hulk Forums!!!

    Wild guess is you need a triple outlet fuel pump.
    Forgot about that!

  5. #5

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    Quote Originally Posted by PolarisNut View Post
    Is the piston melting, or is it another type of failure? If its melting, there are a few possiblities here...one is the carbs are plugged, another could be the crank seal on the PTO end is leaking, crank could be out of phase, airleak at base gasket or reed cage. When replacing a failed piston, you always have to find the cause, or you'll be repeating yourself again...they never melt down for no reason.
    It is detonating burning/blowing a hole through the top of the piston.
    I have a new fuel pump from a 780 with three valves but I am a bit unsure how to install it.

    RT

  6. #6

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    Quote Originally Posted by PolarisNut View Post
    Forgot about that!
    Got it, have not installed it yet.

  7. #7

  8. #8

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    Talking

    Thanks! I will give it a try.

    RT

  9. #9
    I like Boobs. wetwolf's Avatar
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    Blown base gsk, or rear seal. should be easy enuff to see. If it's not either of those, then its fuel supply, or crank out of phase on the rear cyl.

  10. #10
    Connecticut CrazyA's Avatar
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    Quote Originally Posted by TXslt950 View Post
    It is detonating burning/blowing a hole through the top of the piston.
    RT
    How do the other 2 pistons look? Any mods? What spark plugs are you running?

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