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  1. #1

    Top-end time on Polaris 1200 motor

    I've got a 2000 virage TX with 187 hours on the clock (1200cc triple). The motor is stock save for some high compression heads. The ski has been raced a little, but the last 5 years or so it has been used mainly for pulling little kids around on wakeboards. When should I be looking to do a top end? Should I just watch the compression levels, or is there a time where it is best to go ahead and replace the top end? Thanks.


  2. #2
    seaobin's Avatar
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    Best time:

    Winter time

  3. #3
    ryandi2's Avatar
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    check compression.. if its low (100's) or lower or uneven freshin it up.. but if it runs fine run it! just do the maintenance

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    What compression readings are you getting? All spark plugs out, throttle wide open.

    What octane fuel are you using?

    What is the maximum sustained RPM at WOT?

    What octane fuel were the heads designed for?

    High compression race engines generally don't like to be lugging around towing a load. The concern is detonation from the combination of compression and mid-range RPM operation.

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    AWA Member 32DegH2O's Avatar
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    Polaris recommends a rebuild at 100 hours. But we all know the engine can go a lot longer than that, however, it's better to do it while things are running fine than to wait till signs of trouble start to show cause it can get far more expensive if the engine goes which it can do in a hurry. I would say this winter would be a good time for it.

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 32DegH2O View Post
    Polaris recommends a rebuild at 100 hours...
    What kinds of failure does a top-end refresh of a currently well running engine protect against?

    Primarily metal fatigue in the piston and rings?

  7. #7
    PolarisNut's Avatar
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    Quote Originally Posted by K447 View Post
    What kinds of failure does a top-end refresh of a currently well running engine protect against?

    Primarily metal fatigue in the piston and rings?
    The only major problem I've seen is when the pistons get worn and the clearance is too great, it can cause the skirts to break....which obviously gets very ugly. I think Sirhc had close to 200hrs on his 1200, and most of those hours were when he was modded. The stock Elko pistons are very good and don't shrink much over time, like some of the other brands do. I've never had this issue with one of these pistons...Needless to say, I won't be running my Taiwanese WSM pistons that long

  8. #8
    AWA Member 32DegH2O's Avatar
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    Quote Originally Posted by K447 View Post
    What kinds of failure does a top-end refresh of a currently well running engine protect against?

    Primarily metal fatigue in the piston and rings?
    Depends on what you quantify as a well running engine.

  9. #9

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    The only symptom I had on my 1200 was that the peak RPM was down about 100. I found that the compression was lower than the last time I checked it. A tear down showed that the ring lands had broken. The Elko pistons had only 120 hours on them. I'm not a believer in the quality of these pistons anymore!

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