Need help finding correct needle bearings
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  1. #1
    PWCToday Guru crazycalito330's Avatar
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    Need help finding correct needle bearings

    Working on a 550 SX Reed motor, ordered up needle bearings from dealer, and they're too small of an OD they have slop in the rod, but fit the wrist pin on ID just fine. Need to find the correct bearings of about 21mm OD. Rods are pro series 4031 if that helps, crank was built years ago and been sitting since. I have one old bearing that fits but need to find two new ones (you can see OD cage difference in first picture). I'm wondering if these rods use a special bearing from another application? TIA

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  2. #2
    PWCToday.com Is My Home Away From Home BLRider's Avatar
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    Re: Need help finding correct needle bearings

    How many needle bearings are in the ones you need and what is the diameter of the needle.
    Never argue with an idiot, they will drag you down to their level then beat you with experience.

  3. #3
    PWCToday Guru crazycalito330's Avatar
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    Re: Need help finding correct needle bearings

    12 rollers and I'm not sure what you want me to measure is it not in one of the pictures? Thanks for the help

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  4. #4
    PWCToday.com Is My Home Away From Home BLRider's Avatar
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    Re: Need help finding correct needle bearings

    Measure the diameter of a single needle bearing (1 of the 12)
    Never argue with an idiot, they will drag you down to their level then beat you with experience.

  5. #5
    PWCToday Guru crazycalito330's Avatar
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    Re: Need help finding correct needle bearings

    2.5mm

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  6. #6
    PWCToday Guru crazycalito330's Avatar
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    Re: Need help finding correct needle bearings

    Bump. Checked out some bearing companies, could find the right type/size in their catalogs

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  7. #7
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    Re: Need help finding correct needle bearings

    I think you should be measuring the overall OD on the needles themselves while they are mounted on the wristpins, not the needle cases. I know they will feel a little loose when dry fitting just the bearing into the rod without the wrist pin being in them.
    Last edited by matismo; 05-12-2018 at 12:02 AM.

  8. #8
    PWCToday.com Is My Home Away From Home Chester's Avatar
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    Re: Need help finding correct needle bearings

    Quote Originally Posted by crazycalito330 View Post
    Bump. Checked out some bearing companies, could find the right type/size in their catalogs

    Sent from my SM-N910V using Tapatalk
    Good to know you found them.

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