Fork Fluid

[jbfla]

Originally Posted by Motocrazy

Hey I can chime in here. I just changed mine recently. I couldn't find Mobile 1 ATF but I used another well known brand I can't quite recall. But I also used the synthetic ATF. I let my forks drain for a couple of days and got 325 CC's of fluid out of each one. After changing the fluid the sharpness did go away a little. Certainly better than stock.
Hope yours get better as well. Good luck.

Thanks, Moto.

Did you put in the recommended 330 cc or the 325 that came out?

Another question that I should know, but don't.

What is the weight of ATF? Is it all the same? As I recall, there are different types of ATF.

jb

[2LZ]

Funny thing is I got 320cc's out of each TT fork on the first drain (spec is 330 also) but the RX3 only gave me the 250. I believe it's due to that cartridge that holds the extra 80, as katflap pointed out.
Possibly if I would have let them drip a few days as Moto mentioned, then it may have given the entire 320-330.
Especially after a couple rides, I feel confident that the correct amount went back in.

[david3921]

Originally Posted by jbfla

Thanks, Moto.

Did you put in the recommended 330 cc or the 325 that came out?

Another question that I should know, but don't.

What is the weight of ATF? Is it all the same? As I recall, there are different types of ATF.

jb

Spud, as always, did the homework for us. Check out post 27 here for the info; http://www.chinariders.net/showthrea...t=chart&page=2

[Weldangrind]

Spud's chart is very helpful. Another ATF that Spud has recommended in the past is Valvoline Maxlife ATF, which comes in a little lighter than Mobil 1 Synthetic ATF. Maxlife viscosity@40C cSt is 28.82, whereas Mobil 1 is 34. Both are excellent choices; it depends on your specific needs/preferences.

[2LZ]

Originally Posted by david3921

Spud, as always, did the homework for us. Check out post 27 here for the info; http://www.chinariders.net/showthrea...t=chart&page=2

Good find! Good find, david3921!
Yes....Spud always comes through....wherever he may presently be. We're still currently in a potato famine. ;-)

Like I've said, I've always had spectacular performance from the Bel Ray, even back in my younger MX days when I was far more demanding of my bikes....but I may have to try the Mobile 1 ATF next time around. As Spud pointed out, it's less expensive, easy on the rubber, doesn't foam like the older ATF's I've run, and is readily available many local places....and Lord knows I don't ride like I used to ;-)

[david3921]

Originally Posted by 2LZ

We're still currently in a potato famine.

I was thinking about this the other day also.

[rtking]

Originally Posted by david3921

I was thinking about this the other day also.

Count me in as I've been pondering this also.

[BlackBike]

Originally Posted by 2LZ

Good find! Good find, david3921!
Yes....Spud always comes through....wherever he may presently be. We're still currently in a potato famine. ;-)

Like I've said, I've always had spectacular performance from the Bel Ray, even back in my younger MX days when I was far more demanding of my bikes....but I may have to try the Mobile 1 ATF next time around. As Spud pointed out, it's less expensive, easy on the rubber, doesn't foam like the older ATF's I've run, and is readily available many local places....and Lord knows I don't ride like I used to ;-)

Mobil 1 synthetic atf ! I think I even have some left. 204k on that silverado and have changed a.t. 5 times exclusively with the stuff. First time it took 14 qts to replace all the organic stuff (quiet expensive as I remember) but i believe it made all the difference in keeping my transmission alive.

[jbfla]

Originally Posted by david3921

Spud, as always, did the homework for us. Check out post 27 here for the info; http://www.chinariders.net/showthrea...t=chart&page=2

Thanks, David.

Impressive chart.

But what is a centiStoke?

And how does that translate into terms normal people can understand?

And where the heck is Spud?

jb

[humanbeing]

A centistoke (cSt) is the derived centimeter-gram-second (CGS) unit of kinematic viscosity.
---
I don't care what's inside those fancy fork oil
DEXRON-VI https://en.wikipedia.org/wiki/DEXRON#DEXRON-VI ATF or AW32 Hydraulic fluid from name brands is economic workhorse in bike's forks

[AdventureDad]

Originally Posted by humanbeing

A centistoke (cSt) is the derived centimeter-gram-second (CGS) unit of kinematic viscosity.

Yeah...that didn't help. Take it down to dolphin level for me, please.

[BlackBike]

Originally Posted by AdventureDad

Yeah...that didn't help. Take it down to dolphin level for me, please.

He's bi or multi lingual but still not speaking in my language

[humanbeing]

A unit to measure this:

[Jay In Milpitas]

Originally Posted by jbfla

Thanks, David.

Impressive chart.

But what is a centiStoke?

And how does that translate into terms normal people can understand?

And where the heck is Spud?

jb

It gets very complicated. Best to just consider it a mystical unit of measurement. The only way it is handy for folks like us to use is in a chart so we can use it to select something thinner or thicker than what we are currently using.

Product Whoopie Oil 10 rates at 28 cS and we want something a little bit thicker. Product Nifty Oil 15 sounds good, but actually flows at 25 cS. So that's not what we would want to buy.

[pete]

Originally Posted by jbfla

Thanks, Moto.



What is the weight of ATF? Is it all the same? As I recall, there are different types of ATF.

jb

Weight is a SAE rating for lubeication..
forks/shocks work by flow rates that is the
centistroke "CST" rating at 40*c

I have never seen a CST rating for ATF.. but I have
never looked either.... not something i would put in my forks...

the real prob with useing weight.. Is a 10 weight oil
from one company can be the same as a 15 weight from another
the weight rating is all over the place with no real standard..

For a dirt/trail bike...
used in the dirt stay with a centistroke "CST" rating under 18..

There are CST Centistroke charts on the net that give almost
all fork/shock oil from diffrent companys & bike Manafactures oil
in the centistroke rating..

Google is your freind...



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