brake and clutch fluids
Thread Starter
Senior Member
Superstock
Joined: Jun 2010
Posts: 313
From: South Kakalaki
brake and clutch fluids
Haven't had my SH that long but I know as a general rule when the fluids get darker its time for a change. Question is, what could cause the fluids to turn dark so quickly. The previous owner who I still chat with once in a while (he's got lots of parts and goodies he hooks me up with) supposedly changed the fluids just before he sold it to me. I'm pretty sure I remember them being fairly clear. Now, just a few months later they are almost black. In my limited experience that fluid change isn't some that you change that often.
I'll try to get some picks up when its light out.
I'll try to get some picks up when its light out.
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MotoGP
Joined: Aug 2007
Posts: 5,942
From: Lake View Terrace, CA
Well the first 2 questions would be what year is the bike? and does it still have the stock lines or have they been replaced?
The reason for these questions is that if you still have the rubber lines (which actually allow water to migrate through them) and the fact of the high humidity\ moister where you live could be the reason for the rapid color change.
If you don't have them yet, replace the lines with SS braided lines and do a good flush of the system. Also plan of completely changing the fluids at least once a year.
The reason for these questions is that if you still have the rubber lines (which actually allow water to migrate through them) and the fact of the high humidity\ moister where you live could be the reason for the rapid color change.
If you don't have them yet, replace the lines with SS braided lines and do a good flush of the system. Also plan of completely changing the fluids at least once a year.
Senior Member
SuperSport
Joined: Sep 2008
Posts: 805
From: Delmar NY
I think there is an additional reason that causes the brake fluid to look dark quickly. On my bike I noticed that six months after a fluid change the rear resevoir still looked clear and pristine but the front would go dark in a matter of months - clutch too but to a slightly lesser degree.
In the front resevoir a large portion of the volume is taken up with a black diaphragm. Because of that diaphragm I think even a slight darkening of the fluid appears much more significant.
My theory anyway...
In the front resevoir a large portion of the volume is taken up with a black diaphragm. Because of that diaphragm I think even a slight darkening of the fluid appears much more significant.
My theory anyway...
Out of my mind, back in 5
MotoGP
Joined: Nov 2006
Posts: 6,109
From: Skurup, Sweden
Actually that diaphragm is like all other rubber... It's a good idea to swap it for a fresh one after a few years since it starts "leaking" more moisture, just like old lines...
But yeah, it migth add to the visible darkness somewhat...
But yeah, it migth add to the visible darkness somewhat...
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MotoGP
Joined: Aug 2007
Posts: 5,942
From: Lake View Terrace, CA
It all depends on how much you want to spend and what makes you sleep the best at night.......
Actually any DOT 4 will work. Now I have gone to using Motul RBF600 as I am a pretty hard braker and it is the best compromise between cost and performance that I have found. http://www.amazon.com/Motul-RBF-Raci.../dp/B000AURZ08
But if you really want the very best, then you want Castrol SRF Racing Brake Fluid but you will have to pay to play in that league.......
http://www.hrpworld.com/index.cfm?tp...action=product
Actually any DOT 4 will work. Now I have gone to using Motul RBF600 as I am a pretty hard braker and it is the best compromise between cost and performance that I have found. http://www.amazon.com/Motul-RBF-Raci.../dp/B000AURZ08
But if you really want the very best, then you want Castrol SRF Racing Brake Fluid but you will have to pay to play in that league.......
http://www.hrpworld.com/index.cfm?tp...action=product
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Besucher98
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Oct 24, 2005 03:52 AM
