Master Cylinder change and DOT 5
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Tourer
Joined: Aug 2013
Posts: 287
Likes: 14
From: Georgia
Master Cylinder change and DOT 5
I'm changing the master cylinder on my 2001 Fat Boy, and the stock requires DOT 5 brake fluid. Is the DOT 5 a requirement of the master cylinder or the brake caliper, or both? Or is it mandatory just because that's what was being used 15 years ago as the standard? I'm wondering if I will need to switch to DOT 4 since it's a newer design master cylinder.
Road Master
Joined: Jun 2013
Posts: 953
Likes: 127
From: Rome, NY
I'm changing the master cylinder on my 2001 Fat Boy, and the stock requires DOT 5 brake fluid. Is the DOT 5 a requirement of the master cylinder or the brake caliper, or both? Or is it mandatory just because that's what was being used 15 years ago as the standard? I'm wondering if I will need to switch to DOT 4 since it's a newer design master cylinder.
The only real cautions are (short form)
1. Don't mix DOT3/4 and DOT5.
2. Don't use DOT5 in an ABS system.
3. Don't switch from DOT3/4 to DOT5 w/o a thorough flush to remove any possible water deposits.
Tourer
Joined: Feb 2013
Posts: 358
Likes: 38
From: Spain
My rocker c use dot 4 in the front and rear brake system.
But I changed the handlebars elements in chrome with a chrome set aftermarket. In the instructions of new chrome master cylinder , say "use dot5". When I installed the new master cylinder, I used dot 5.
Master cylinder is who use the requirement of dot4 or dot 5.
But I changed the handlebars elements in chrome with a chrome set aftermarket. In the instructions of new chrome master cylinder , say "use dot5". When I installed the new master cylinder, I used dot 5.
Master cylinder is who use the requirement of dot4 or dot 5.
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