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  1. #1

    Join Date
    Dec 2012
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    JS550 Top-End Rebuild Kit?

    Here's a general question for all of you old-school guru's: I'm helping my nephew rebuild the top-end of his 1985 JS550. This will be our first time rebuilding a top-end and it will be used for recreation only. What brand of top-end kit do you all recommend? I'm seeing all different brands on the internet. Or is this a case for going OEM? Any info. you can provide would be greatly appreciated. Thanks!


  2. #2
    Pain is fear leaving your body.... rlovebk's Avatar
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    Aug 2008
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    OEM is best. Can you get OEM pistons in a kit? I haven't looked for a while so. I use Wiseco pistons. Many like WSM. If you can not get OEM get a WSM top end kit.
    There is a lot to getting one of these things to running good and pulling thru the range. Do some research and have fun. Great little ski's.

  3. #3
    steve45's Avatar
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    If you had an Ultra 150, I'd say OEM only. But for a 550, I don't think it's critical. I'd probably use WSM. I've used Wiseco before and their gasket kit sucked. At least WSM gives you gaskets that fit.

  4. #4

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    Dec 2012
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    Your right rlovebk... I can't find an OEM kit for the 550. At $160 - looks like I'll be going with the WSM kit with all gaskets included. Thanks for the info!

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