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Old 10-27-2009, 02:10 PM   #1
tomgunz13
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Default Help!! type of brake fluid to use

New to the bike world, trying to find out what kind of brake fluid i can use in my 2000 gsxr 600, DOT 3 or DOT 3 full synthetic??
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Old 10-27-2009, 03:02 PM   #2
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The lid should say dot 4 only. And you should use dot 4 or higher. If you put dot 3 in there you might have to drain it all out and flush/ bleed the brakes. It wont handle the high temps of a sport bike. You don't want your brakes to fail.
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Old 10-27-2009, 03:09 PM   #3
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Dot 3 brake fluid is the lowest quality you can get, synthetic or otherwise and was really designed for older vehicles. It has a very low boiling point and in a high performance motorcycle your fluid could get very hot. Also it is very hydroscopic (absorbs water).
Suzuki recommend Dot 4 fluid and they also recommend never to mix fluids ( although Dot 3, Dot 4 and Dot 5.1 can in theory all be mixed). Dot 5 is not recommended and should never be mixed with other Dots) Dot 4 has a higher boiling point and is slightly less hydroscopic. Assuming your current fluid is Dot 4 non-synthetic, then if you are going to a full synthetic, you should completely flush the system before changing. But full synthetic isn't really that critical. It is recommended for ABS braking systems as it has a lower viscosity (is thinner) than non-synthetic.
I would buy a good quality Dot 4 standard fluid or if you wish, a synthetic Dot 4 but as you cannot be 100% sure what type is already in there, it would be a good idea to flush the system anyway. I'm sure the fluid you already have in there will have collected some water moisture anyway which can corrode the brake lines over time so a change as opposed to a top-up is probably best.
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Last edited by oakleyspatz; 10-27-2009 at 03:13 PM.
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Old 10-27-2009, 05:34 PM   #4
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Motul RF600 is the shizzle by far.
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Old 10-27-2009, 05:40 PM   #5
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just go with good ole DOT 4
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Old 10-27-2009, 05:45 PM   #6
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Quote:
Originally Posted by you da man View Post
Motul RF600 is the shizzle by far.
Motul RBF600: Excellent Dot 4 fully synthetic fluid. Used by many racers and has an extremely high boiling point and very low hydroscopic properties. Some may say it's overkill on a road bike but I agree with you da man.....Anything else is a compromise!!
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Old 11-02-2009, 06:01 PM   #7
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Thanks everyone, I went with the DOT 4 synthetic.
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Old 11-04-2009, 10:06 AM   #8
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I use Super Blue In the bike and in the IS
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Old 11-04-2009, 02:11 PM   #9
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I used a DOT3 and 4 fluid. The container says its both 3 and 4 compatible. Should I flush and switch to 4 only?
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Old 11-04-2009, 02:27 PM   #10
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I would say yes...Your brakes are probably the most important item on a high performance motorcycle, it's prudent to make them as good as possible. Dot 3 is,to be honest, crap and not really any good for a sportsbike. Suzuki recommend Dot 4 and not to mix different Dot fluid. Although this isn't essential, Suzuki recommend it to ensure maximum performance and remove any chance of compatibility issues between different Dot fluids.

It's up to you at the end of the day and carrying on as you are, you may never have a problem with the brakes, but wouldn't you feel safer knowing your brakes are as good as they can be?
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Old 11-04-2009, 02:49 PM   #11
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Motul RBF 600 is one of the better racing brake fluids for track and hard street application. Though it should be changed with some frequency, depending on usage. Fluids with high dry/wet boiling points tend to be more hydroscopic. When in doubt, flush the old and refresh.
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Old 11-05-2009, 10:01 AM   #12
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I would stick to the same brake fluid rating. Be it DOT4 or full synthetic. Don't mix em together at all. I'd recommend doing a full brake bleed at the end of each season or at some point during a given year. I mean it's fairly cheap to do!
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Old 11-05-2009, 11:19 AM   #13
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Use DOT 4 or higher because of the heat build up.
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