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  1. #1
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    Carbon Nomad Rear Fox RP23 Shock Service/Rebuild Question

    So it was time for me to replace the seals on my rear shock. I got the rebuild kit from my LBS and watched the vids from Pinkbike and the Fox guys. Rebuild was fine except for one odd thing. When I went to remove the upper most o-ring, the one that seals the main air can to the shock body there was no o-ring there.

    When I assembled it I followed all the vids and placed the large o-ring in there. The only thing is when I hand tighten the air can on there is a small gap between the ridge of the air can and the body of the shock. The gap is about the size of the o-ring. I can't believe that there would be no o-ring on the top but there wasn't one there before.

    Has anyone done this service and any thoughts? I kept the o-ring in there (and I re-opend the shock to double check that I didn't miss the old o-ring and doubled them up) and pumped it up shock seems fine.

  2. #2
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    Which o ring are you talking about exactly, the really large circumference and thin one near the threads or are you talking about one of the quad rings?

  3. #3
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    Quote Originally Posted by litany View Post
    Which o ring are you talking about exactly, the really large circumference and thin one near the threads or are you talking about one of the quad rings?
    I'm talking about the large thin one near the threads. It falls right in however when I screw the air can on the lip of the air can doesn't snug to the main shock body. As I mentioned this looks odd and I'm not sure why there was no o-ring there to begin with. I'm the second owner so I'm not sure if anyone has cracked the shock open before me or if it came with no o-ring.

  4. #4
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    Quote Originally Posted by badbietz View Post
    So it was time for me to replace the seals on my rear shock. I got the rebuild kit from my LBS and watched the vids from Pinkbike and the Fox guys. Rebuild was fine except for one odd thing. When I went to remove the upper most o-ring, the one that seals the main air can to the shock body there was no o-ring there.

    When I assembled it I followed all the vids and placed the large o-ring in there. The only thing is when I hand tighten the air can on there is a small gap between the ridge of the air can and the body of the shock. The gap is about the size of the o-ring. I can't believe that there would be no o-ring on the top but there wasn't one there before.

    Has anyone done this service and any thoughts? I kept the o-ring in there (and I re-opend the shock to double check that I didn't miss the old o-ring and doubled them up) and pumped it up shock seems fine.
    I found the same and did the same. Rode it for a month so far and it's fine.

  5. #5
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    Quote Originally Posted by bikedrd View Post
    I found the same and did the same. Rode it for a month so far and it's fine.
    Hmm, I wonder if this shock doesn't use that upper o-ring. Would be interested if anyone else has cracked there's open and if there is an o-ring there or not.

  6. #6
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    So I called Fox and they said the o-ring is supposed to fall into the grove but the o-ring that comes with the kit is too large. I'll call Fox tomorrow and see what they say.

  7. #7
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    Quote Originally Posted by badbietz View Post
    So I called Fox and they said...the o-ring that comes with the kit is too large.
    WTF. So is there a new RP23 kit or something? I know they have said the current kit covers a large range of model years, I haven't heard anything about a new kit but prices on the kits sure have gone up in the last couple years (doubled).

  8. #8
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    I will bet the original o-ring is still there. It's pretty small, and tucked way up in the end cap. You need a small pick to get it out. The seal kit comes with 2 rings for that location. A thick one for older shocks that you discard, and a thin one that you use.

  9. #9
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    I have rebuilt 2 RP23s now (both 2011 from SC bikes) and did not have this issue. There is in fact an o-ring up there, that is very small and can be replaced. There is a thick o-ring included in the kit but its WAY to small in diameter to fit up at the top of the can.

    If I had to guess, I would wager that you didn't get the o-ring out in the first place and now have two up there. It IS a PITA to get that one out.
    Alcohol may lead nowhere, but it sure is the scenic route!

  10. #10
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    Rebuild kit prices

    Quote Originally Posted by litany View Post
    WTF. So is there a new RP23 kit or something? I know they have said the current kit covers a large range of model years, I haven't heard anything about a new kit but prices on the kits sure have gone up in the last couple years (doubled).
    Yea I was just watching that video on rebuilding (ie: replacing seals/o-rings) on my Fox RP23 and the guy in the vid says how you can get the kit for $6. Yea right... X number of years later the same kit is $14. WTF, seriously! Since when did eight or so 10 cent o-rings warrant doubling the $6 price to $14.

    I am surprised no one has a forum going that lists the o-ring sizes for the DIY-ers out there like myself.

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