Heard of Cloudy clutch fluid? - Honda CBR1000 Forum : 1000RR.net
 
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post #1 of 7 Old 05-18-2017, 02:23 PM Thread Starter
noahb
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Heard of Cloudy clutch fluid?

This was a about a month or so ago no issues now, but...still can't find anything other than moisture on car forums.

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In the pictures^
Top layer/amber colored: random oil(irrelevant)
Middle layer/green mark: dot4 fluid,
Bottom layer/red mark:sediment from the little flush I did.


Before last winter I cleaned the brake lines/caliper tear down/MC/etc. decided to do clutch line too and flushed both systems. Was great.

then starting this season I noticed the clutch lever was able to "draw towards" the grip a tad bit before I felt any pressure, and it pulled forward in gear while clutch lever was fully depressed. No biggy, flushed it while also not seeing any leaks and pressure is perfect clutch disengages as it should when lever is depressed.

When I did the quick flush, I noticed in the top reservoir as I would pump the lever I'd see a cloud "poof" out into the clear dot4 that was already in the res...that slowed down, but then I noticed the fluid coming out of the bottom would have this sediment sitting at the bottom...

I've read old fluid can cause moisture to build in the oil itself?? Anyway, I know the system was clean and the fluid was new unopened bottles...so... anyone else have this ever happen to them? Is it sign of any corrosion? I'm going to do a complete flush just for the fact I saw sediment in general but...any ideas behind the cause?
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post #2 of 7 Old 05-18-2017, 02:26 PM Thread Starter
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post #3 of 7 Old 05-25-2017, 03:35 PM
FIREBLADE74
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Had this happen on my '76 cb550 when I was flushing/bleeding my brake system. Looking down in the MC as I pumped the brakes I could see a plume of a cloudy substance come through the air hole in the bottom of the cylinder. I kept pumping and it got less and less until it was a really faint trail coming out.

I chalked it up to debris and moisture in the line due to a 41yo bike. brakes are rock solid and the fluid looks good so I don't worry about it much but I do check it often to make sure its not contaminating the good fluid. So far no problems.

Could the dot 4 have been mixed with dot 3? Old brake lines letting moisture thru?
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post #4 of 7 Old 05-26-2017, 05:50 PM Thread Starter
noahb
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Heard of Cloudy clutch fluid?

Thanks for the piece of mind,


Nah the dot 4 bottles were unopened at the time I overhauled them, and I know from the bleeds I've done prior that it was dot 4.
And I wouldn't think that the lines would need replaced, blade has been in a good garage it's whole life with me other than living at an apt, wasn't insulated but still in a garage. Thinking about it...bike is 10 years old now. That's a sad thought.

I'll go over it all again just to make sure there's nothin loose, or misaligned that could be causing some kinda gap
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post #5 of 7 Old 05-27-2017, 09:40 AM
Jaybird180
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Rubber deteriorates over time. I've seen this cloud but not sure what causes it. You and I, my friend are due for line replacements regardless. Nice upgrade and a little bling to go with.

-2006 CBR1000RR- Jardine RT-1 CF, GP Shift rearsets, GP Suspensions 20mm revalve, Penske 8987 triple clicker (more upgrades in progress)
-2013 CBR250R-ABS (Hers and now SOLD)
-2002 CBR600F4i (Track/Street) (was mine and now hers)
ZG Dbl Bbl, Galfer SS Lines, PC3r, Muzzy s/o, K&N air filter, NRC stator cover, ShiftMinder(WTF?), Fireblade brakes, Gold Rearsets, undercut gears, Factory Pro Shift Kit, Ohlins-Racetech&Showa custom Suspension
Because 12,000 RPM makes me feel better
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post #6 of 7 Old 05-27-2017, 05:01 PM Thread Starter
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Quote:
Originally Posted by Jaybird180 View Post
Rubber deteriorates over time. I've seen this cloud but not sure what causes it. You and I, my friend are due for line replacements regardless. Nice upgrade and a little bling to go with.

Aww...haha I'm a cheap cheap man. I Will have to acknowledge after the bachelor party this weekend


Good lookin out.
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post #7 of 7 Old 05-27-2017, 05:39 PM
d207gp_2017
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Some think that contaminants migrate through the seals in the clutch slave cylinder and manage to somehow make their way up to the MC. Come to think of it, the slave cylinder does operate in a rather hot and nasty environment down there by the countershaft sprocket.
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