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  1. #1
    o uncola o's Avatar
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    Talking Pump bearing sizes

    What size are the bearings on the pump (front and rear) for a GPR? Are these the same sizes that are used on the "Magnum" Skat pump?

    I am going to be putting a skat pump together. Figured while the bearings are pulled, I might as well look at some really bad a$$ bearings to put into it.

    -Jason


  2. #2
    o uncola o's Avatar
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    Bumping a mad old thread. Would like to find this out if possible.

  3. #3

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    I believe that RPM racing in Arizona did some work with their pump modifications on Gpr's back in the day. I would give them a call. Maybe Hydrotoys is aware of the mods done.

    They did put in heavier duty bearings.

  4. #4
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    Yup, RPM (Ted Thompson) did bearing upgrades for RPM back in the day. The SKAT setback bearing assembly for the Yamaha is woefully weak and wobbly. The Skat-Magnum pumps that are NOT setback use the stock Yami system, and are much better design.

  5. #5
    o uncola o's Avatar
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    I am having some trouble identifying my Skat pump. I am going to throw some pictures up and see if anyone recognizes it.

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