Dot 5 brake fluid quick answer needed
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Road Warrior
Joined: Apr 2018
Posts: 1,347
Likes: 820
From: Moneta, Virginia
When I got here he had already flushed with the 5.1.
He wants to just flush again with 5... I think Ive talked him into running some alcohol through then a thorough flush with 5!
Thanks for all the quick responses
He wants to just flush again with 5... I think Ive talked him into running some alcohol through then a thorough flush with 5!
Thanks for all the quick responses
Extreme HDF Member
Joined: Aug 2013
Posts: 16,271
Likes: 15,108
From: Somewhere SW
OP use the fluid the bike calls for, my evo called for DOT 3 my TC calls for DOT 4. Don't mix your fluid and flush the system with what's required.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,195
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From: NW AR
What year Evo used DoT3, Dave? I've only seen DoT5 requirements from shovelheads on up until the Twinkies came out.
I certainly respect your automotive experience, and we all agree that mixing them is A Very Bad Thing.
I certainly respect your automotive experience, and we all agree that mixing them is A Very Bad Thing.
Extreme HDF Member
Joined: Aug 2013
Posts: 16,271
Likes: 15,108
From: Somewhere SW
IIRC my 89 evo did but don't quote me on it.
HDF Community Team
Joined: Dec 2005
Posts: 5,375
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From: NC USA
And yes, best to always go with whatever is stamped on the master cylinder....
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,183
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From: W. Texas
You can get denatured alcohol at most home paint stores or paint departments.
It's the best stuff to use and run atleast a quart through the front and the rear brake systems. Using a vacuum bleeder is easiest.
Gently blow out the lines from the calipers back to the master cyl's
The correct brake fluid will flush out the any remaining alcohol.
WP
It's the best stuff to use and run atleast a quart through the front and the rear brake systems. Using a vacuum bleeder is easiest.
Gently blow out the lines from the calipers back to the master cyl's
The correct brake fluid will flush out the any remaining alcohol.
WP
Last edited by WP50; Apr 23, 2021 at 01:39 PM.
Seasoned HDF Member
Joined: May 2008
Posts: 21,031
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From: South Carolina
Harley started using DOT5 in the mid `70s.
Last edited by Dan89FLSTC; Apr 23, 2021 at 02:17 PM.
Seasoned HDF Member
Joined: Feb 2008
Posts: 22,998
Likes: 11,439
Bottom line 5.1 and 5 do not mix. Flush it out as mentioned do it right and start over. No it will not be ok if you just drain it and put the right stuff in.
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HDF Community Team
Joined: Dec 2005
Posts: 5,375
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From: NC USA
Since this thread turned into a borderline "oil thread" check out post #1 and #2 if you have what I call "unauthorized" brake parts on your bike. Pretty good read actually....
https://www.hdforums.com/forum/dyna-...e-brembos.html
And I'll have to take back what I replied to justdave in post #9 on this thread.
https://www.hdforums.com/forum/dyna-...e-brembos.html
And I'll have to take back what I replied to justdave in post #9 on this thread.
Extreme HDF Member
Joined: Aug 2013
Posts: 16,271
Likes: 15,108
From: Somewhere SW
I never messed with the brake fluid on my evo, I've changed pads but never the fluid.