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  1. #1

    780 Piston Pin Removal

    Getting ready to replace the CEN cylinder piston, rings, and cylinder. Just wanted to know if it is a pressed pin like the rest of the engines I've read about.

    Is it possible to remove without a piston pin puller? Homemade or store bought?

    Will I have enough room to get it out without removing the other cylinders & heads? As I recall there isn't much room between the cylinders.


  2. #2
    Carson's Avatar
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    Quote Originally Posted by dswelch View Post
    Getting ready to replace the CEN cylinder piston, rings, and cylinder. Just wanted to know if it is a pressed pin like the rest of the engines I've read about.

    Is it possible to remove without a piston pin puller? Homemade or store bought?

    Will I have enough room to get it out without removing the other cylinders & heads? As I recall there isn't much room between the cylinders.
    Ooooo, thats going to be a pita.. I used a socket on my PTO cylinder and lightly tapped it and the pin came out.. but I had room to hit it..

  3. #3
    Not sure I have ever seen a 2 stroke with pressed wrist pins. I would think your engine has a floating pin with needle bearings on the small end of the rod. If it has clips in the piston holding the pin in then it is a floating pin. Pull out one of the clips and try to push the pin out. I have used a razor knife to debur the hole making it easier to get the pin out.

  4. #4
    Floating pin is what I was hoping for. I guess I'll find out once I get the cylinder off. I've read about having to press the pins out on other Polaris models, so I was getting nervous. I don't want to have to pull the other cylinders just to change out the center one. With only about 2" to work with I don't see anyway of getting a piston pin puller in there to press it out.

  5. #5
    BlueFishCrisis's Avatar
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    Quote Originally Posted by dswelch View Post
    Floating pin is what I was hoping for. I guess I'll find out once I get the cylinder off. I've read about having to press the pins out on other Polaris models, so I was getting nervous. I don't want to have to pull the other cylinders just to change out the center one. With only about 2" to work with I don't see anyway of getting a piston pin puller in there to press it out.
    The pin is held in with circlips, but does not come out easily even with them removed. You will need a puller to get a pin out.

  6. #6
    Figures, I'll pull the other cylinders to get the room needed.

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