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Old 15-01-05, 12:48 PM   #1
Trix
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Default Brake fluid

This is a very stoopid question to be asking, I'm sure, but I (with a little help!) am changing the brake hoses today for HEL braided lines, and have been told that I also need to drain and replace the brake fluid - didn't think of that - d'oh!

I know you get different types of fluid, so could anyone tell me what I should be getting?

Thanks
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Old 15-01-05, 12:53 PM   #2
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There are basically 2 choices...

DOT3 or DOT4

Unless you have a major problem with the brake fluid boiling or are likely to go racing, I would stick to the (very slightly cheaper) DOT3.
Brake fluid in cars is the same as in bikes, so you should be able to get it in Halfords ro similar.
Good luvk with bleeding the brakes - it can sometimes be tricky and it is very useful to have 2 pairs of hands to do it... Bleed kits seem to differ in effectiveness too.

HTH
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Old 15-01-05, 01:40 PM   #3
Stig
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Dot 4 is the standard fluid used. Personally I wouldn't use anything else.
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Old 15-01-05, 01:48 PM   #4
Itching 2 go
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Quote:
Originally Posted by coombest
There are basically 2 choices...

DOT3 or DOT4
HTH
AND DOT 5 OR 5.1 THESE ARE FOR RACE OR BLOO*Y FAST ROAD RIDING BUT USUALLY USE DOT 4 ITS CHEAPER AND YOU CAN PICKIT UP FROM ANY CAR OR BIKE SHOP
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Old 15-01-05, 01:49 PM   #5
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sorry about using caps lock people i am not shouting just using a dos stock controll system and it needs caps
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Old 15-01-05, 02:12 PM   #6
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Quote:
Originally Posted by Itching 2 go
Quote:
Originally Posted by coombest
There are basically 2 choices...

DOT3 or DOT4
HTH
AND DOT 5 OR 5.1 THESE ARE FOR RACE OR BLOO*Y FAST ROAD RIDING BUT USUALLY USE DOT 4 ITS CHEAPER AND YOU CAN PICKIT UP FROM ANY CAR OR BIKE SHOP
That's not right I2G. 5 and 5.1 are different animals. One of them will be ok the other won't! It will knacker the seals! Can't remember which way round it is though.

Stick to DOT 4. That's what it says on the reservoir cap. You won't go wrong then.
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Old 15-01-05, 02:29 PM   #7
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Quote:
Originally Posted by Scoobs
Quote:
Originally Posted by Itching 2 go
Quote:
Originally Posted by coombest
There are basically 2 choices...

DOT3 or DOT4
HTH
AND DOT 5 OR 5.1 THESE ARE FOR RACE OR BLOO*Y FAST ROAD RIDING BUT USUALLY USE DOT 4 ITS CHEAPER AND YOU CAN PICKIT UP FROM ANY CAR OR BIKE SHOP
That's not right I2G. 5 and 5.1 are different animals. One of them will be ok the other won't! It will knacker the seals! Can't remember which way round it is though.

Stick to DOT 4. That's what it says on the reservoir cap. You won't go wrong then.
you are right dot 5 needs ceramic seals and will need changing every couple of months dot 5.1 you can use with normal seals as it wont damage them and requests that you change it anually
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Old 15-01-05, 02:40 PM   #8
Trix
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Thanks for the advice dudes

I actually went for the 5.1 in the end (thanks for the recommendation Itchy), after chatting to someone else. I know now that I'll have to change it more often than the DOT 4, but it seems to be a better quality fluid for only a few quid more.

Right, off to my my hands dirty....
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Old 15-01-05, 03:47 PM   #9
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One other quick question to anyone that's had experience with the HEL braided hoses. Did you find that they seemed too long? I'm in the middle of fitting them at the mo, and they are a fair bit longer than the standard ones. Surely the idea is that you have as little slack as possible to allow for more effective braking??
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Old 15-01-05, 07:03 PM   #10
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They were just the right length for me. I have the HEL 3 line kit (2 for the front, 1 for the back).

The line for the back was much shorter than the others (obviously). The front left line is slightly longer than the front right.
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