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  1. #1
    Buplaux's Avatar
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    At what compression # do I need to think about rebuild gp1200r?

    My stock motor with 80 hours compression numbers are rear=112, center=117, and front 117. Rebuilt wsm platinum piston motor on sister ski is at 121 on all three cylinders. When do I need to do top end on original? Thanks


  2. #2

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    As long as all read within 10% of each other, I would wait until at least 120 hours.
    Enjoy riding it this summer and make it next winter's project.

  3. #3

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    Ensure you have a good compression gauge. I use the Innova from OReilly's. Has a Schrader valve in the end of the hose. A really nice setup. Costs about 70 bucks. Well worth the price.

  4. #4
    Buplaux's Avatar
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    Quote Originally Posted by toyterrific View Post
    As long as all read within 10% of each other, I would wait until at least 120 hours.
    Enjoy riding it this summer and make it next winter's project.
    Thanks. It runs really well and I didnt want to mess with it if it isnt necessary at this time. Exactly what I was thinking regarding making it next winters project.

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