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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts?
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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts? - May 9, 2014, 05:13 PM

I changed my brake fluid 3 weeks ago to ATE blue on my Speed Triple, today I noticed the fluid in the reservior looked yellow so I opened it to verify; sure enough it was yellow. I checked the rear and it was still blue. Has anyone ever heard of ATE turning yellow? The only thing I can think of is that I got caught in the rain Wednesday and maybe my reservior is not sealing 100% and maybe water got in there. Other than that the only other explaination I know of is that someone syphoned out my fluid and put something other than brake fluid in, which is far fetched.

Any help? Thanks
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May 9, 2014, 07:57 PM

Was it like brand new brake fluid light yellow or was it green-yellow? Only thing I can think of is there was still old fluid in the lines and it mixed over time.
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May 9, 2014, 08:35 PM

Yes, I've seen it turn yellow. Might have something to do with exposure to sunlight?


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May 9, 2014, 08:50 PM

His fluid is straight up old yellow. Think 7 year old DOT3 yellow. We pulled all the old fluid out when we flushed with Super Blue.

Somebody has to be having a laugh. It's probably piss.
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May 9, 2014, 09:10 PM

Mountainsurfer's vs mine. Flushed 2 weeks apart. Same can, same mightvac.





Last edited by pschmidt; May 9, 2014 at 09:26 PM..
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May 9, 2014, 09:36 PM

Contamination.


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May 9, 2014, 11:24 PM

Now that is weird!


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May 10, 2014, 02:27 PM

I have had it turn green... Switched to Amsoil and no issues


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May 10, 2014, 02:55 PM

Maybe the remains of the old fluid made the new one change colors because of a reaction? It still seems very very weird to me... Are you pranking us all?


2011 Ducati Diavel Chromo (Current)
2007 BMW R1200GS Adventure (Current)
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1997 Aprilia RS250
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May 10, 2014, 03:16 PM

Nope for me.... fresh MC/Lines and completely rebuilt calipers.


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May 10, 2014, 09:54 PM

We flushed the fluid today. Blue in the lines, old fluid yellow in the reservoir. It's either a crap reservoir or someone pissed in it. Time will tell either way.
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May 11, 2014, 07:17 AM

A passing government official saw your bike, and wanted to save you from having put windshield washer fluid in your brake reservoir, so he siphoned out what he could and replaced it with an approved color
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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts?
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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts? - May 11, 2014, 05:03 PM

Didn't they stop selling that in the US because the gov mandated dot 4 needs to be amber color? RBF600 is what I use from Motul.
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May 11, 2014, 06:40 PM

Yes, but you can still get it.

I switch back and forth between blue and clear each flush.
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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts?
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ATE Blue Brake fluid turned yellow in 3 weeks, thoughts? - May 11, 2014, 06:53 PM

I think they used to make blue and red fluid so you would know when you got it all out. Haven't seen the red stuff since like 08 though.
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