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Old 11-04-06, 06:50 PM   #1
benchcomptons
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Rock Shox FSX fork repair?

Hello,

So I'm trying to fix up an old mountain bike. It's a Specialized Rockhopper. It has a suspension fork, but the suspension does not do anything except for sink all the way down when I ride the bike. My understanding is that I should get some new elastomers, how do I do that?

The people at the bike shop said that it would be hard to find what I need and that I might just want a new fork, the problem is that just buying a new fork is no fun at all. The second problem is that while Ive done a lot of work on road bikes, I don't know anything about suspension. How can I learn about it? Also, I think that I have a Rock Shox FSX fork for a 1 and 1/8 frame.

One last question: The chain skips a lot when going uphill. Does anyone know any good tricks to fix this problem?

Thanks very much,
Ryan
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Old 11-04-06, 07:37 PM   #2
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It looks like an air sprung model... hard to tell from your photo.

Are there preload knobs on top of each leg, or just blank plastic caps?
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Old 11-04-06, 08:10 PM   #3
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blank plastic caps...
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Old 11-04-06, 09:59 PM   #4
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You should be able to pry the caps off to reveal the air fill valves. Pressure is about the same as the Rock Shox Mag series -- 30 to 45 psi.
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Old 11-04-06, 11:25 PM   #5
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Okay,

So I got the caps off and there was a whole bunch of brown junk inside which I'm just assuming is the same stuff that you find in a rain gutter. It looks like I can just pump up the inside with a basketball-style air pump, very interesting.
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Old 11-05-06, 12:51 AM   #6
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That's pretty much it.

Here's the service manual .pdf for the Rock Shox Mag series. Your fork is similar to the Mag 20, but without the low speed compression adjustment knobs up top.

http://www.sutherlandsbicycle.com/files/RSSection4.pdf

Last edited by Svr; 11-05-06 at 01:00 AM.
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