Air forks

rmpilot
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rmpilot
Edited Date/Time 1/26/2012 11:44am
I just bought an 84 yz 490 and it has valves to put air in them. is there a max on much you can put in them? any idea on how to set them up?
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T-Fish
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T-Fish 4/25/2011 2:03pm
4/25/2011 2:03pm
Two strokes suck.
rmpilot
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rmpilot 4/26/2011 9:25am
4/26/2011 9:25am
i think you are just jealous
xnationalwrench 4/26/2011 11:15am
4/26/2011 11:15am
It would depend on how your forks are set up, usually you use the valves to bleed the air out of the forks not use put air in them.
rmpilot
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rmpilot 4/26/2011 11:34am
4/26/2011 11:34am
xnationalwrench wrote:
It would depend on how your forks are set up, usually you use the valves to bleed the air out of the forks not use put...
It would depend on how your forks are set up, usually you use the valves to bleed the air out of the forks not use put air in them.
i just wasnt sure because i thought air forks had gone away by 84 and these are valves right on top of the tubes. they look exactly like a tire valve.

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Craze
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Craze 4/26/2011 3:38pm
4/26/2011 3:38pm
Bleeders!!!
EatAChode
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EatAChode 4/27/2011 4:03am
4/27/2011 4:03am
For the style of fork your referencing increasing the fork pressure beyond atmospheric would most likely generate negative performance results.

As noted above they are essentially bleeders and should be used as so.

Air (roughly 80% nitrogen, which is also used in the rear shock...well 100% nitrogen) compounds quickly as it heats up and expands. As the fork compresses this effect is further multiplied making the forks too progressive.

Also being the forks are damper rod style this is not a good thing but that is totally something else to elaborate on.

I am not usually a fan of Race Tech products but their Emulators are a quality product that really help those style forks.
johnnyg
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johnnyg 4/27/2011 6:06am
4/27/2011 6:06am
Nuitrogen doesnt erxpand with temp, thats why its ysed in tires/sus.....
rmpilot
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rmpilot 4/27/2011 3:53pm
4/27/2011 3:53pm Edited Date/Time 4/27/2011 3:53pm
thanks for the help everyone
EatAChode
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EatAChode 4/28/2011 12:22am
4/28/2011 12:22am
johnnyg wrote:
Nuitrogen doesnt erxpand with temp, thats why its ysed in tires/sus.....
Actually that is not correct. Air (roughly 80% nitrogen) and pure nitrogen posse very similar expansion rates when temperature increases.

Pure nitrogen lacks moisture, hence one of the main reasons it is used in shocks.

In a bind you can successfully still use compressed in in a shock. I just wouldn't do it.

Good try and work on your spelling.
johnnyg
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johnnyg 4/28/2011 2:36am
4/28/2011 2:36am
I guess my dig guadges @ work lie.lol
johnnyg
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johnnyg 4/28/2011 2:38am
4/28/2011 2:38am
I guess my dig guadges @ work lie.lol
RACEGUY
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RACEGUY 4/28/2011 11:31pm
4/28/2011 11:31pm
That didn't make any more sense the second time around.
huck
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huck 4/29/2011 6:41am
4/29/2011 6:41am
johnnyg wrote:
Nuitrogen doesnt erxpand with temp, thats why its ysed in tires/sus.....
EatAChode wrote:
Actually that is not correct. Air (roughly 80% nitrogen) and pure nitrogen posse very similar expansion rates when temperature increases. Pure nitrogen lacks moisture, hence one...
Actually that is not correct. Air (roughly 80% nitrogen) and pure nitrogen posse very similar expansion rates when temperature increases.

Pure nitrogen lacks moisture, hence one of the main reasons it is used in shocks.

In a bind you can successfully still use compressed in in a shock. I just wouldn't do it.

Good try and work on your spelling.
Irony... It rules!

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