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My Clymers manual says clearly DOT 3 for brake fluid.
The top of my master cylinder on my 2004 clearly says DOT 4

Which one do I put in??
 

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My Clymers manual says clearly DOT 3 for brake fluid.
The top of my master cylinder on my 2004 clearly says DOT 4

Which one do I put in??
I use DOT 4 because it absorbs less moisture and has a higher boiling point. Either could be used.
 

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DOT 4 is just a synthetic version of DOT 3. It will last longer before turning into goo, and will have a higher boiling point, which probably doesn't really mean much on these bikes.

Whichever you use, it should be flushed out and changed every 2-3 years. It's also smart to do it on cars every so many years as well, as brake fluid absorbs moisture, and causes calipers to rust/freeze over time, and flushing the fluid helps keep this from happening.

Investing in a set of speedbleeders makes it easy.

http://www.speedbleeder.com/



Good Luck!
 

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..have a vulcan good day!
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My Clymers manual says clearly DOT 3 for brake fluid.
The top of my master cylinder on my 2004 clearly says DOT 4

Which one do I put in??
Mechanics will verify it is safe to go up or down one DOT #. Personally, I'd stay with DOT4.
 

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Mechanics will verify it is safe to go up or down one DOT #. Personally, I'd stay with DOT4.
NOT ENTIRELY TRUE.

In the case of DOT 3 and 4... Yes.

However, DOT 5 is silicone based, and is NOT compatible with DOT 3 or 4.
 

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I'd go with what is written on the MC itself. Clymers are out of date in some ways..and do have typos.


Dot 4 is better anyway...............
I agree with KM!
 

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I use the DOT 4.
 
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