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  1. #1
    olds72's Avatar
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    Caged needle bearings vs non caged

    wanted to get some opinions on the use of caged needled bearings for the top end vs using the non caged. I was at my local sea doo dealership talking to the mechanic and he said never to use caged needle bearings. My top end will be arriving and it includes caged needle bearings. Should I buy the non caged?


  2. #2

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    Do your rods have oiling holes at the top of them? What motor is this build for?

  3. #3
    KrunchovXPL-GTX-RX's Avatar
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    I have had no problem with caged but have had a cageless fail with just 8 hours on it.

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    It's not that caged needle bearings won't work. It's just that non-caged needle bearings have more needles than non-caged, therefore they are able to carry more load. On a completly stock motor, operating under normal conditions, caged are probably just fine. However, on a highly modified motor, I would not consider them. Rotax chose non-caged bearings for a reason.
    Robert V

  5. #5
    olds72's Avatar
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    Quote Originally Posted by jim View Post
    Do your rods have oiling holes at the top of them? What motor is this build for?
    787 RFI

  6. #6
    KrunchovXPL-GTX-RX's Avatar
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    Quote Originally Posted by s/d-daddy View Post
    It's not that caged needle bearings won't work. It's just that non-caged needle bearings have more needles than non-caged, therefore they are able to carry more load. On a completly stock motor, operating under normal conditions, caged are probably just fine. However, on a highly modified motor, I would not consider them. Rotax chose non-caged bearings for a reason.
    Robert V
    That argument has been around forever, and I am not saying there is not some merit to it.

    I was once a "Cageless Only" Nazi. Until I had that one fail at 8 hours and eat an otherwise perfect running, stock as it could get, 947. I know of two guys who have run caged bearings with Coffman pipes on 947s. They were turning a lot of RPMs and had a lot of hours on those engines.

    Make your own choice, but you are probably fine either way with what you are building. Caged bearings are a lot easier to deal with. The packaging allegedly makes the cageless easy to install but...

  7. #7
    olds72's Avatar
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    My engine will be completely stock. No changes other than having the cylinders bored.I guess I'll use the caged bearings that come with my top end kit. Since failure can happen with anything mechanical. I can't worry about anything I have no control over.

  8. #8
    vomitspot's Avatar
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    i have seen tons of cageless fall out and taco the motor
    720-947cc
    cageless bearing have greater load rating and offer less rolling resistance but...
    also less reliability
    my skis all have cage bearings
    note : i have seen cage bearing fail as well = that really eff things up
    j

  9. #9
    olds72's Avatar
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    Quote Originally Posted by vomitspot View Post
    i have seen tons of cageless fall out and taco the motor
    720-947cc
    cageless bearing have greater load rating and offer less rolling resistance but...
    also less reliability
    my skis all have cage bearings
    note : i have seen cage bearing fail as well = that really eff things up
    j
    man... I feel better now

  10. #10
    vomitspot's Avatar
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    ok maybe this will help you out
    i have seen WAY more cageless fail than caged
    jason

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