Top Fuel SL Pivot Question- Mtbr.com
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  1. #1
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    Top Fuel SL Pivot Question

    Hey all. Thanks in advance for any feedback.

    I was replacing my pivot bearings on my 2017 Top Fuel 9.8 SL recently and noticed the main frame bearings have a sleeve over the bolt between the bearings. Anyone no why this is necessary, or has anyone removed that sleeve?

    Reason I ask, is that I am chasing an odd click that I think may be coming from the calipers, but I am not ruling out that the sleeve is making a metal on metal noise. I doubt it, but it could be.

  2. #2
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    The pivot spacer goes between the bolt head and bearing and between the nut and bearing so that the inner races get pinched and secured against the pivot spacer between them. They are required to ensure proper spacing and the bearing don't bind. I put a light coating of grease on the contact points.
    Do the math.

  3. #3
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    I think we may be talking a out something different. The lower swing arm and the upper pivot assembly’s have a bolt that goes through the seat tube. Inside the seat tube between the bearings is a sleeve that the bolt goes through, That is what I am referring to. You remove that bolt and one of the larger bearings inside the seat tube and that sleeve will fall down to the B.B.

  4. #4
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    Do you mean nr 23 in the image? I assume it's supporting the bearings when you are tightening the pivot bolt. Without that spacer, I am guessing you risk either cracking the frame or having the bearings just fall into it when you start tightening.

    Top Fuel SL Pivot Question-tf-pivot-spacer.jpg

  5. #5
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    Yes. It is 23. The bearings have cups so they can only go in to a certain point. I guess there is an argument for lateral support for the seat tube in some ways though.

  6. #6
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    So fwiw. That noise was not the pivot sleeve. Will be keeping the sleeves in place.

  7. #7
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    Realize this is an exceptionally old thread, but it seemed like an idea. Took my suspension apart to ship to fox now I'm trying to put piece#17 back in place. Do these go between the shock and the bearing or the nut head and the bearing? If it's the former, I'm at a loss for how to install.

  8. #8
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    17 goes between the shock and the bearing. The best way is to use a little grease on the washer to "stick" them to the bearing to hold them in while you install the shock.

  9. #9
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    +1 on the grease as glue.

  10. #10
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    How do you pull the #15 bearings? The ID of #23 bushing and bearings are the same. They don't push through, and there is no lip to push them out from the opposing side.
    Thanks for the help to anyone still monitoring this thread.
    Last edited by KenKinSV; 04-05-2019 at 08:10 PM.

  11. #11
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    Quote Originally Posted by KenKinSV View Post
    How do you pull the #15 bearings? The ID of #23 bushing and bearings are the same. They don't push through, and there is no lip to push them out from the opposing side.
    Thanks for the help to anyone still monitoring this thread.
    I would like to know this also

  12. #12
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    The usual is a bearing puller. Do you have a pic?
    Do the math.

  13. #13
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    Quote Originally Posted by Lone Rager View Post
    The usual is a bearing puller. Do you have a pic?
    Also known as a blind bearing puller with slide hammer. Every once and a while you can find a kit on amazon/ebay for around $40, it bounces between there and over $100 I believe. I bought one (for $40), it's been useful, but I don't use it all the time obviously. Much of the time, it's still easier to punch the bearing out with a punch and mallet.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

    You're turning black metallic.

  14. #14
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    I honestly think I used an tube, a delicate vice clamp, and a few delicate taps of a socket to get mine out. worked pretty well.

  15. #15
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    Trek recommended this tool: https://wheelsmfg.com/presses-tools/...actor-set.html
    I ended up making a bearing puller with a slotted steel sleeve, a flared concrete anchor and a couple of nuts, The concrete anchor expended the sleeve inside the bearing so I could tap them out.
    Attached Thumbnails Attached Thumbnails Top Fuel SL Pivot Question-bearing-tool.jpg  


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