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DOT 5 Silicon Brake Fluid

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Andrew_s
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DOT 5 Silicon Brake Fluid

#1 PostAuthor: Andrew_s » Sun Jan 19, 2020 11:11 am

I use DOT 5 silicon brake and clutch fluid in my TRs and whilst it gives long-life and protection to the paintwork it does make the brake pedal feel a little bit spongy, but I'd sooner that than use DOT 4 mineral fluid given the protection and known potential downside of DOT 5.

My A4 uses DOT 4, but for the reasons above I'm considering changing to silicon, I know the callipers needs to be flushed out and pipework either flushed or replaced - is anyone using DOT 5 on their bike and if so I'd be grateful for your experience.

Cheers,
Andrew
Bikes:
Phil Churchett's old Z900 A4: PRE 2R - https://www.flickr.com/photos/115740825@N05/albums/72157680116996884
1970 CB750 K1
Cars: 1958 Triumph TR3A, 1972 Triumph TR6
Previous Zeds: Z750B1 Twin, Z650B1, Z750E

Robw
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Re: DOT 5 Silicon Brake Fluid

#2 PostAuthor: Robw » Sun Jan 19, 2020 11:22 am

Used Dot 5 on my Yamagamma, never had any problems with the braking on it.
Rob
Z1000R/ZRX, RD 125LC, Zx7r , Endurance racer, gpz1100b1

r3sc
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Re: DOT 5 Silicon Brake Fluid

#3 PostAuthor: r3sc » Sun Jan 19, 2020 3:24 pm

I’ve been using DOT 5 in every one of my bikes for years, and still have it in all my bikes with hydraulic brakes.

When I change over to DOT 5 I usually strip the system and clean thoroughly with meths and rebuild as usual then fill and bleed with the DOT 5.

Only on one bike have I ever had a problem and that was on a GS1000 which still had the original rubber hoses and the sponginess was more to do with the hoses than the fluid itself.

The benefits of the DOT 5 far outweigh the work caused by the fluid change.

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bedlow1
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Re: DOT 5 Silicon Brake Fluid

#4 PostAuthor: bedlow1 » Sun Jan 19, 2020 5:49 pm

using dot 5 in my z1b since complete brake referb, due to master cylinder weep several years ago luckily no tank paint damage. Cant say ive noticed any difference in operation or performance.
Now where did I leave my Keys!

johnA
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Re: DOT 5 Silicon Brake Fluid

#5 PostAuthor: johnA » Sun Jan 19, 2020 8:12 pm

i use dot 5 in all mine with no problems although i think i read somewhere it can attract moisture if you leave the bottle for a long time.


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