Fox Shock Rebuild - HCS Snowmobile Forums

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Old 01-15-2020, 11:57 AM   #1 (permalink)
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Default Fox Shock Rebuild

So I am new to the whole Fox shock rebuild thing. I typically put around 500-1000 miles a year on my sleds. Do the shocks really need to be rebuilt every year or every other? What wears out in them? Seems like a lot of hassle and cost. Is there another option? Could I go longer?
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Old 01-15-2020, 11:30 PM   #2 (permalink)
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I rebuilt a lot of Fox shocks back in the day. If the nitrogen and/or oil leaks out of them, they can't do their job as a shock. To really tell their internal condition, at the very least you'll need to measure the nitrogen charge. If the gas pressure is found to be low, you should rebuild them.
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Old 01-16-2020, 08:35 AM   #3 (permalink)
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Most riders spend far too much time and money rebuilding shocks. They would be far better off having them revalved in the first place and only rebuilding every three or four thousand miles.....Once you have ridden a sled set up with shock valving by a pro, for you, you will have all your sleds done before they hit the snow.
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Old 01-16-2020, 08:52 AM   #4 (permalink)
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Quote:
Originally Posted by 99ZRGuy View Post
So I am new to the whole Fox shock rebuild thing. I typically put around 500-1000 miles a year on my sleds. Do the shocks really need to be rebuilt every year or every other? What wears out in them? Seems like a lot of hassle and cost. Is there another option? Could I go longer?
Probably a good idea to go through them every 2 years if generally trail riding. Not only the nitrogen charge slowly leaks, shocks absorb water to. The shock oil breaks down over a season and can increase wear and hurt performance. I've see what happens to a shock that collects water inside....not pretty. Its too bad shock companies like ohlins aren't involved in producing snowmobile shocks for sled manufactures, we wouldn't need such frequent rebuilds.
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Old 01-16-2020, 09:03 AM   #5 (permalink)
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The seals on a shock are not perfect. They are required to keep the nitrogen and oil in and the water out. But heat/cold cycles cause expansion and contraction of parts, they are a moving part, and in a rather abusive environment, all this adds up to imperfect seals.

Since shocks lose their capability very slowly, it is often hard to tell that they are going bad. Not until you have them rebuilt is the difference noticeable.

So in general, it's up to you. Do you ride such that you require your shocks in tip-top condition for every ride? If so, every 1000 miles is not a bad rule. If after 1000 miles it still doesn't feel too bad to you, well keep riding it. Every 3000 miles is not out of the question.

To baydog's point, getting your shocks re-valved for your weight and riding style will give you the optimum solution, but that is a one-time deal. You'll want this done by a professional shock tuner, not just a dude with a nitrogen tank who charges your $25/shock.

Just don't sweat it too much...
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Old 01-16-2020, 09:07 AM   #6 (permalink)
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I send all of my shocks to The Shock Shop in Becker MN, good quality work and quick turn around time.
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Old 01-17-2020, 08:29 PM   #7 (permalink)
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Thanks for all your advice. My shocks are on year 2 and seem ok. I might look to have them customized if i Havre to pull them out again anyway after this season. Someone mentioned a place in MN. Is the going rate about $50 each?
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Old 01-17-2020, 08:46 PM   #8 (permalink)
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Thanks for all your advice. My shocks are on year 2 and seem ok. I might look to have them customized if i Havre to pull them out again anyway after this season. Someone mentioned a place in MN. Is the going rate about $50 each?
Carver performance in Fosston,Mn. has done all my shocks for years..... Mike Carver knows fox shocks as well as anyone. Might be a bit more than $50 for a revalve......
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Old 01-17-2020, 09:15 PM   #9 (permalink)
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I send all of my shocks to The Shock Shop in Becker MN, good quality work and quick turn around time.
Good to hear. They just built me a shock today.
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Old 01-17-2020, 11:24 PM   #10 (permalink)
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Quote:
Originally Posted by too slow View Post
Probably a good idea to go through them every 2 years if generally trail riding.
Depends on what general trail riding means to whomever reading. When did you do yours last? What did it cost?
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