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Old January 4th, 2017   #21
Wjbertrand
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Default Re: Results Of Brake FLuid Testing!

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Originally Posted by JZH View Post
I've got absolutely nothing to back up my opinion other than "feeling", but I would have said just the opposite: brake fluid is put under tremendous heat and pressure, whilst clutch fluid just gets pushed around gently!

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Old January 4th, 2017   #22
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Default Re: Results Of Brake FLuid Testing!

The clutch fluid may be under more pressure than one would think.
At one point it pretty much the same action taking place.
Brake fluid pushes against a piston(s) in the caliper, Clutch fluid pushing against a piston inside the slave cylinder.
Clutch springs a stouter than one would think and you've got a few.

Something to think about.
At a stop light do you stop with the bike in gear with the clutch lever in holding the pressure on or do you go to neutral and let the lever out releasing the pressure?
How long is the light or how long you going to hold the pressure on?


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Old January 4th, 2017   #23
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Default Re: Results Of Brake FLuid Testing!

I think the extra travel/displacement in the clutch hydraulics contributes faster accumulation of wear particles from the seals, etc.. This is likely part of what causes the clutch fluid to darken so quickly. Unless you're on a race track the brakes don't stay hot very long. Many chemical degradation reactions are more susceptible to sustained temperature exposure, even if that temperature is lower that occasional temperature peaks the brakes would normally see. Manufacturers go to some effort to isolate the heat source from the brake fluid. Honda's rear pads come with an insulator shim. The front pads are directly exposed to fresh air flow so Honda evidently decided the same level of insulation was not necessary there.
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Old January 12th, 2017   #24
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Default Re: Results Of Brake FLuid Testing!

Quote:
Originally Posted by Wjbertrand View Post
I prefer logic and analysis.
That time of the month, I guess...

Ciao,
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