What brake fluid is preffered?

[Kid Jedi]

switching over to dot 5 soon, looked up the MDS on the fluid, does not react with the seals in the xz550, double checked em to make sure that are not silicone based,  and got a new ss brake line and all brand new seals, bought dot 5 for 7.99 for 16 oz.  I will guinea pig it and let y'all know how it goes.  my slave piston is a little pitted already, so if it turns to a rusted hulk I won't lose much

[inanecathode]

Where did you find the MDS on the vision brake caliper seals or master cylinder cups?
Is the stainless brake line lining compatible with dot 5?

[Kid Jedi]

yes the line is, checked with galfer. founds the MDS on the dot 5 found out that the seals are not made from silicone, called brembo and asked bout the types of seals, they said only newer bikes have silicone seals and those are always red/orange to prevent a dot 5 mix up, tested a seal over night in dot 5, no distortion or change in flexibility and talked to a hydrolic systems commissioner with 25+ years of experience, dad, who did a dot 5 conversion in his bike  ( a suzuki gs550) with no problems. So suck it blue!


I will let you know how it goes

:D

[inanecathode]

yes the line is, checked with galfer. founds the MDS on the dot 5 found out that the seals are not made from silicone, called brembo and asked bout the types of seals, they said only newer bikes have silicone seals and those are always red/orange to prevent a dot 5 mix up, tested a seal over night in dot 5, no distortion or change in flexibility and talked to a hydrolic systems commissioner with 25+ years of experience, dad, who did a dot 5 conversion in his bike  ( a suzuki gs550) with no problems. So suck it blue!


I will let you know how it goes

:D

How did you accurately measure stiction with the caliper piston seals?

[Kid Jedi]

digital caliper before and after

and a spring stretch gauge, 1.75 lbs of force = same distance

and a triple beam balance for possible dissolving.

all numbers within 0.2%

Why?

[Kid Jedi]

200 miles on my dot 5 system, no problems, no leaks, no bubbles.

the purple fluid color is kinda cool

[kwells]

so why the switch?  I have 3 bikes now and brake fluid is definitely one thing I don't worry about cept for maybe after a couple years.

[inanecathode]

and a spring stretch gauge, 1.75 lbs of force = same distance


Why?

Are you talking about pliability or stiction? They're different, and makes the difference between a failed caliper seal and a functioning caliper seal.

[Kid Jedi]

i was just measuring for fun.

Did another 300mi since the conversion.

all is well



dot 5 has a wet boiling point of 500F what is the wet boiling point of dot 3?

I like having one more thing worry free.

[kwells]

Dot 3 is 401 degrees.  Dot 5 is 500.

Compared to DOT 3 & 4, DOT 5 is highly compressible.  This interprets to a 'spongy' feel in comparison.  DOT 5 does in fact have a high boiling temp and does not eat paint but it is at a cost.

If it is extreme temps you want to withstand...Then I'd say go for 5.1.  Its boiling temp is about 520.  Dot 4 BT is around 450 and only requires bleeding it through the system.  Yet, it is still hydroscopic and will not allow pooling of water int he caliper.

[Kid Jedi]

haven't felt spongy, and running great.