Fox Air Shox set-up

motoarmageddon
Edited Date/Time 12/18/2021 9:58pm
Does anyone know where there is some info on what air pressure settings to use for a vintage bike with fox air shox? I am racing a 1979 RM250 with Fox Air Shox, and I need to find out how much air to run in them
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Shawbridge Husky 2/12/2016 1:39pm
2/12/2016 1:39pm
You would want to get the manual, there are hard copies all over eBay, maybe even some .pdf's online. I have a Fox monoairshock for '79 F bikes and yes setting info seems to be hard to come by. Look up Thor Lawson's site he has lots of repair parts available as well as different damping valve ball springs.
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newmann
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newmann 2/12/2016 3:07pm
2/12/2016 3:07pm
Some one here has a manual available that has all the pressure settings. Not so much per bike, but you have to calculate a few things to arrive at the settings you want. Pressurize the bladders first and then the upper chamber. I have a manual packed away somewhere if you aren't in a hurry.
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Todd D
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Todd D 2/12/2016 3:32pm
2/12/2016 3:32pm



This might help
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Todd D
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Todd D 2/12/2016 3:42pm
2/12/2016 3:42pm
Or this

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The Shop

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newmann
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newmann 2/12/2016 3:44pm
2/12/2016 3:44pm
Todd, how about the SLR ratio formula? Says page 9. Thanks.
Todd D
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Todd D 2/12/2016 3:59pm
2/12/2016 3:59pm
Well if you have nine you got to have ten too and I'm gonna throw in a bonus picture just because it's cool as hell





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sandman768
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sandman768 2/13/2016 4:26am
2/13/2016 4:26am
motoarmageddon wrote:
Does anyone know where there is some info on what air pressure settings to use for a vintage bike with fox air shox? I am racing...
Does anyone know where there is some info on what air pressure settings to use for a vintage bike with fox air shox? I am racing a 1979 RM250 with Fox Air Shox, and I need to find out how much air to run in them
I had mine rebuilt by Thor Lawson, rebound is very fast, nothing is cooler than a set of old school Fox air"s!
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Shawbridge Husky 2/16/2016 12:12pm
2/16/2016 12:12pm
All great info and thanks FTE I saved your site !
yzweldon
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yzweldon 2/17/2016 6:53am
2/17/2016 6:53am
I went with 115/200 psi 2.3 Lever Ratio, with 215cc of oil. The rebound seems too fast to me, manual says the rebound Jet is actually Holley Main jets, How Handy!

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newmann
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newmann 10/15/2019 6:38am
10/15/2019 6:38am
Bob's inspiration for the original Fox Air's came from the old CZ Falta air shocks. I with help of another Vitard found him a couple sets and some rebuild kits for his museum. All aluminum construction and super lightweight.



His first attempt was this setup on his 73 Maico 400 which used a large diameter fluid hose routed to a single reservoir. Obvious reasons this didn't work out for production but he did say that this design worked quite well.




Early production Fox Airs (1975?) did not use a bladder and were single pressure in the upper body only. They did have external adjustable dampening. 200 sets produced and pretty hard to find a nice set. Ended up with about $1500.00 tied up in piecing together the almost perfect set here.







Check that welding that my nephew did on the swing arm forward shock mounts.



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newmann
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newmann 10/15/2019 7:06am
10/15/2019 7:06am
Production line.


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PN27416
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PN27416 10/15/2019 1:58pm
10/15/2019 1:58pm
Very cool Newmann!
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ktmfun219
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ktmfun219 10/16/2019 7:27am
10/16/2019 7:27am
I have a pair of 15.75" non-black fox shocks for sale. Appears low to no use. Would need serviced from shelf storage and bike/rider set up. Call or text me at 219-276-2176.
FreshTopEnd
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FreshTopEnd 10/16/2019 2:51pm
10/16/2019 2:51pm
Then there was the intermediate step between first gen and dual air versions.








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FreshTopEnd
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FreshTopEnd 11/29/2021 9:37am
11/29/2021 9:37am
It suck all to hell to reread Joe's posts, that's all I have to say. Damn I miss him.
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tydog
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tydog 11/29/2021 5:27pm
11/29/2021 5:27pm
FreshTopEnd wrote:
It suck all to hell to reread Joe's posts, that's all I have to say. Damn I miss him.
I agree, miss him so much. FYI he just had a new granddaughter come into the world today.
I wonder who the other Vitard was that helped on that project 🤔 and shortened the shock bodies??
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Oldmxer95
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Oldmxer95 12/13/2021 8:38pm
12/13/2021 8:38pm
I’ve got a pair of 17.5” Fox Air Shox I decided to sell. One ride since new seals and oil. $600.00 plus shipping.
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Oldmxer95
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Oldmxer95 12/18/2021 9:58pm
12/18/2021 9:58pm
Oldmxer95 wrote:
I’ve got a pair of 17.5” Fox Air Shox I decided to sell. One ride since new seals and oil. $600.00 plus shipping.
Shocks sold.
garytruesdill 10/22/2023 7:57pm
10/22/2023 7:57pm
Todd D wrote:
Or this [img]https://p.vitalmx.com/photos/forums/2016/02/12/123626/s1200_image.jpg[/img]
Or this

I forget, How do you slow the rebound, jets?  Where can I get a gauge 

thank you

Bearuno
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Bearuno 10/22/2023 8:25pm
10/22/2023 8:25pm
garytruesdill wrote:

Where can I get a gauge? 

 With the huge amount of shock pumps available for MTB Air Shocks and Forks, the biggest problem you'll have is deciding which one to buy.

PN27416
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PN27416 10/23/2023 4:31am
10/23/2023 4:31am
Todd D wrote:
Or this [img]https://p.vitalmx.com/photos/forums/2016/02/12/123626/s1200_image.jpg[/img]
Or this

garytruesdill wrote:

I forget, How do you slow the rebound, jets?  Where can I get a gauge 

thank you

I'm going off memory here but if I'm thinking right. Jets change rebound and compression. Rebound spring that holds the ball over the jet will change rebound only. Thor at

http://www.evolutionsuspensionproducts.com/

can hook you up with jets, springs and a manual.

MaxPower
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MaxPower 10/24/2023 1:07am
10/24/2023 1:07am

It hits me hard when I see an old post from Joe Newman.  He was a good person who helped anyone that asked

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