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  #1  
Old January 8th, 2008, 02:01 PM
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Kevin Collins
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Leaking Fox Shocks...

The remote reservoir Fox shocks that came with the Stage III kit on my Classic are leaking nitrogen and the rears are starting to become irritatingly worthless. Is there somewhere I can have them rebuilt or will it be cheaper to just replace them? What are my other options if I need to replace them? Are there some out there that are adjustable?
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  #2  
Old January 8th, 2008, 02:59 PM
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Brad Harris
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Fox mountain bike shocks can be rebuilt fairly easily, I assume it's not too hard for the big boys either. A quick google showed up several rebuild kits for a lot less than new shocks would be.
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  #3  
Old January 8th, 2008, 04:06 PM
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Call Polyperformance and get a rebuild kit. 30 or 40 minutes and you can rebuild them. I try to rebuild mine every year or so - very easy. If anything is bent or tweaked, it can be replaced on the shock.
I think the rebuild kit is $9 for the remote reservoirs - it is cheap.
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  #4  
Old January 8th, 2008, 04:55 PM
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Wow..sweet...as usual Google is my friend

Mine are 9 years old and have never been done...so I guess I'm due
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  #5  
Old January 8th, 2008, 07:17 PM
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If you go to the Fox website, they have rebuild instructions for the shocks. Also, if you want to change the valving of the shocks - now is the time to do it.
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  #6  
Old January 8th, 2008, 07:37 PM
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If you want an easy fix for a while, you can put ATF fluid in as a substitute for shock oil. The ATF swells the seals and prolongs the shock life for a while. A rebuild will be necessary eventually. Mine are just about shot.
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Old January 8th, 2008, 09:17 PM
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Does ATF swell rubber o-rings? O-rings are what seal the Fox shocks. There is a fiber band that goes around the piston and keeps the oil flowing through the valves - I personally wouldn't want that swelling as it would prevent movement of the piston.
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Old January 8th, 2008, 10:26 PM
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Quote:
Originally Posted by Hoosier
Does ATF swell rubber o-rings? O-rings are what seal the Fox shocks. There is a fiber band that goes around the piston and keeps the oil flowing through the valves - I personally wouldn't want that swelling as it would prevent movement of the piston.
Yes,

It swells the o-rings. It fixed a leak I had on mine. You just add a little to the oil in the res. Simple fix, but temporary. Although mine has held a year and counting.
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Old January 9th, 2008, 06:07 AM
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Let me know if you ever rebuild it -what the effect was on that band around the piston.
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  #10  
Old January 9th, 2008, 09:52 AM
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Quote:
Originally Posted by Hoosier
Let me know if you ever rebuild it -what the effect was on that band around the piston.
No problem. I am not too worried about it because I got the tip from the guy who rebuilds the SAW shocks. Had to have some major work done on them when I broke them both in half.
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  #11  
Old January 9th, 2008, 10:22 AM
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Quote:
Originally Posted by Buckon37s
If you want an easy fix for a while, you can put ATF fluid in as a substitute for shock oil. The ATF swells the seals and prolongs the shock life for a while. A rebuild will be necessary eventually. Mine are just about shot.
Best cheap trick in the world...been using it for years! (you should see the look of my BMW Motorcycle dealer when I told him about this...he almost disintegrated right there & then!)
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  #12  
Old January 9th, 2008, 10:26 AM
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Thanks for the tip Buck. I'll give it a try and see how it does for a while before doing a rebuild.
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  #13  
Old November 21st, 2008, 11:31 AM
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So I'm finally going to do this. Someone mentioned earlier in the thread about re-valving - mine have been pretty much toast for years so I'm not sure if the way they were originally is what I want or not - but I assume it is how SG wanted them done - so that is fine with me. When I rebuild them I'm only replacing the seals and the fluid right? The valving will be the same? Or do I need to find that out before I do it?
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  #14  
Old November 21st, 2008, 11:38 AM
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I would just go ahead and rebuild and revalve. It's not that hard. I just did a set of Sway Away coilovers not that long ago... took me like 2 hours or something... The trick is getting through the first one, after that they're easy.
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  #15  
Old November 21st, 2008, 12:56 PM
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The rebuild instructions are of the Fox Shox site. There are two seals that look the same, but aren't - one is soft and the other hard. Just replace same with same Make sure the valve stacks remain the same direction and change the oil.
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Old November 21st, 2008, 01:43 PM
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When they say recharge with Nitrogen, can you just use air since it's 80% Nitrogen anyway? Or is there a reason to use pure Nitrogen?
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Old November 21st, 2008, 01:59 PM
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Quote:
Originally Posted by cellulararrest
When they say recharge with Nitrogen, can you just use air since it's 80% Nitrogen anyway? Or is there a reason to use pure Nitrogen?
No, you should only use a dry Nitrogen source.

The reason being dry nitrogen has no moisture/less thermal expansion/contraction. This will help prevent any great performance changes in the shock as it heats up during hard use.
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  #18  
Old November 21st, 2008, 02:00 PM
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Makes sense. I guess. Not a lot of moisture in the air up here at this time of year though.
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