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  1. #1
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    2010 FSR XC Rear Suspension Noise

    Hi all. I have a 2010 FSR XC with an X-Fusion RLA shock. I bought the bike used last May and am having an issue with a honking, creaking noise from the rear suspension. The sound is worst when the rear suspension compresses on high speed banked corners, but can be heard just about any time there is a large amount of compression in the rear suspension. It also feels like I am getting quite a bit of stiction in the rear suspension.

    I have had the bike in at the dealer twice for the problem. The first time they said the pivots all looked fine and the shock just needed to be lubed. This solved the problem for about 100 miles, and then it returned. I took the bike back again and they said things looked fine, but they lubed the shock just to be certain. The 2nd time there was a slight improvement, but the noise and stiction was still there and is getting worse.

    So, thoughts on what I can check? I am starting to doubt the dealer knows what they are doing.

    Thanks

  2. #2
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    I had a noise from my Spec camber which I thought was coming from the rear suspension on compression, but it turned out to be a creaking saddle and/or seatpost clamp.
    Could your noise be coming from other than your bikes pivots / shock ?

  3. #3
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    Quote Originally Posted by LukeSPOOK View Post
    I had a noise from my Spec camber which I thought was coming from the rear suspension on compression, but it turned out to be a creaking saddle and/or seatpost clamp.
    Could your noise be coming from other than your bikes pivots / shock ?
    No, I don't think so as I am getting the noise even when standing.

  4. #4
    Dirt Junkie
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    I hate chasing noises.

    LukeSPOOK said my first though, seat post, clamp or seat.

    Rear quick release or Derailleur hanger? Sometimes they work together to make noise.
    Tighten all the bearings of rear suspension? Shock mounting hardware?
    BB?
    Pedals?
    Headset/Stem?
    Lube each point individually until the noise stops.

    If you can reproduce it in G-outs then just troubleshoot through process of elimination. Carry a small bottle of Tri-flow or something similar and put a few drops in each area and ride same area again.

    Your bike shop will never be able to narrow it down, they will just shotgun parts until it stops. You need to help narrow it down.

    Good luck.
    How can anyone who's been riding as long as I have, be so slow???

  5. #5
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    Re: 2010 FSR XC Rear Suspension Noise

    Good ideas Rock. I'll have to give it a try when I have time, hopefully tomorrow.

    The bike shop is able to replicate the noise, but unable to diagnose.

  6. #6
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    +1 to what Rock said.

    Many times it's just metal-to-metal contact that gets dry, gritty and noisy. I had some creaking with my old Stumpjumper and it was the pivots, but have also seen QR skewers (the cam on the skewer itself or where it contacts the frame), derailleur hangers, pedals, crank/BB, saddle, seatpost, seatpost clamp, stem, and bar all creak.

    Make sure you don't have any cracks in the frame anywhere.

    If no cracks, take off, clean, grease and re-install anything/everything we've suggested. Go one at a time if you want to see what it is, but doing everything at once won't hurt a thing.

  7. #7
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    Check your brake lines as well where they may contact the frame especially on the rear triangle as its a known area where brake lines can and do rub and in some cases have gone through and wrecked a frame.

    Theres a couple of threads on here:
    Tihis one is an Enduro but it affects others just as bad if you don't keep an eye on it or take preventative measures:
    SPECIALIZED ENDURO warranty design flaw
    MTB: Stumpy, Enduro, Hotrock, Commencal Supreme
    ROAD: Jamis Zenith, Pinarello Dogma

  8. #8
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    Solved!

    Thanks all, I figured it out. griffter18 was closest to the pin on this one.

    I could easily replicate the noise by riding off the curb in front of my house. I confirmed it wasn't the seat, seat post, or seat clamp. I checked for frame cracks and found none. Next I took about half the air out of the shock and the noise was much worse. Going off of griffter18's comment I took all the air out of the shock and fully compressed it to see if I could find any place where a cable was rubbing where it shouldn't and hit pay dirt. When the rear suspension was compressed the rear derailleur cable was contacting the tire.

    You can clearly see it in this photo:
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    I took the rear wheel off and can see where the tire was digging a hole into the cable. I also think the black zip-tie visible in this photo doesn't belong:
    2010 FSR XC Rear Suspension Noise-12783291825_a17fa43796_o.jpg

    It also appears there is another cable routing point where the zip-tie had broken near the end of the swing arm:
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    I removed the black zip-tie that I don't think belongs and replaced the broken zip-tie at the end of the swing arm. After that the noise is gone! I'll obviously need a new cable, but at least that is much cheaper than other things it could have been.

    Thanks again for the suggestions!

  9. #9
    Dirt Junkie
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    Cool!!!! good job troubleshooting.

    Sorry the LBS didn't find it, they could have been Heros.

    Ride quiet.
    How can anyone who's been riding as long as I have, be so slow???

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