2011 Fox RP23 Oil Leak behind Rebound Knob- Mtbr.com
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  1. #1
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    2011 Fox RP23 Oil Leak behind Rebound Knob

    I have been doing a lot of research on this and it looks like a common problem for that age range of RP23 rear shocks to leak oil behind the rebound knob and also have a failure of the pro-pedal system. This is happening to my 2011 RP23 now and I am trying to figure out what people have been doing to fix it or where they are sending it for the full rebuild? All post about it were from 2011-2014, so have people just stopped repairing them?

    Side note, I have a 2007/08 RP23 that does not have that symptom, is that one most likely in the clear for the future due to changes in design?
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  2. #2
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    About that time they changed the o-ring inside the rebound metering rod from one made of recycled gummy bears to a square cut nitrile seal. All float RP series, propedal, ctd etc use the same size o ring and any kit you get nowadays will have this new seal.

  3. #3
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    Throw it into the garbage, it's done.

    You can get a new dps shock for under $100 lately. Hard to justify repairing an inferior rp23.

  4. #4
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    DPS is better than RP23? Why are they so cheap? Used DPS's are going for $100-$150, which is same as used, older RP23s...

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  5. #5
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    Yeah, super common issue. As Johnny stated, the o-ring they used in that era turns to goo! If it is a Boost Valve shock, the valve has likely collapsed and you'll notice no change when flicking the compression lever. There are updated parts for that as well

  6. #6
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    Quote Originally Posted by Black Dog Suspension View Post
    Yeah, super common issue. As Johnny stated, the o-ring they used in that era turns to goo! If it is a Boost Valve shock, the valve has likely collapsed and you'll notice no change when flicking the compression lever. There are updated parts for that as well
    Yeah I realized the shock is done... The pro-pedal did nothing.

    So would my RP23 from 2007/08 be immune to this?

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  7. #7
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    Quote Originally Posted by One Pivot View Post
    Throw it into the garbage, it's done.

    You can get a new dps shock for under $100 lately. Hard to justify repairing an inferior rp23.
    It depends what it needs to go on. I have one of these shocks with the same problem. But as it's out of Specialized it's an unusual length. So I'll need it fixed at some point.


  8. #8
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    Quote Originally Posted by One Pivot View Post
    Throw it into the garbage, it's done.

    You can get a new dps shock for under $100 lately. Hard to justify repairing an inferior rp23.
    The repair/replace decision is pre-determined by how obscure the shock size is.
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  9. #9
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    Yeah, get it serviced. Even if you get a used rear shock it'll need service most likely. Buying used suspension is a dangerous game.

    You can tell the suspension people on threads like this. Why is that ID o-ring SO DAMN SMALL?! And the older fluoro-elastene (or whatever) seals are damn-near invisible. How long does it take to get that little square-cut bastard back in there? For me it's 30 seconds to 20 minutes...

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