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  1. #1

    Low compression / need help

    99 Pro785 - low compression in middle cylinder (90 psi), others around 150 psi. Starts rough, runs to about 50mph.

    Can someone please tell me what parts I need to replace - shop hasn't torn it apart yet, but thinking we need at minimum a new cylinder, piston and some type of gasket kit? Debating whether to fix it or part it...

    If anyone knows where I can pick this stuff up used (emailed quite a few people in the classifieds), but problem is I don't know exactly what I need to replace.

    Thank you much.


  2. #2
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    runs to 50 on two good cylinders, try it on all three. You probably need a piston and a base gasket. Depends on the damage, the cylinder is nickel plated and might need to be plated again.

  3. #3
    Thanks for the advice. When we first go it, this thing was the fastest ski I have ever been on. Blows away my Ultra 150, but can't handle the chop.

    I was told that refinishing with nickelsil or whatever it is called would cost as much as a good used cylinder?

    So my need to get list includes: piston, cylinder, and base gasket... anything else?
    Last edited by eye4speed; 06-03-2008 at 09:37 PM.

  4. #4
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    a new piston should come with the rings, c-clips, and a new wrist pin. You will need to get a new wrist pin bearing also to do the job right. Used to be around 10 or 15 bucks

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