BARF - Bay Area Riders Forum

Go Back   BARF - Bay Area Riders Forum > Moto > The Garage


Reply
 
Thread Tools Display Modes
Old 12-20-2018, 10:17 PM   #1
kuksul08
Suh Dude
 
kuksul08's Avatar
 

Join Date: Mar 2014
Location: Hoon Valley
Motorcycles: Whee!
Name:
Change your brake fluid!

Over the years I have worked on a few old motorcycles (not that old, but 15-35 years range), and there is one common issue I see with every single brake system. The brake fluid is old, crusty, gelatinous, brown-ish, black-ish crap. Then, the seals get distorted, the pistons corrode, and the internals corrode.

I have met people who didn't know you even had to change your brake fluid!

You should change your brake fluid completely every 2-3 years at a minimum.


Here's my latest project and what I'm dealing with. This caliper had to be completely replaced.


It only takes 30 minutes to get some new fluid in there. A complete rebuild and flush takes more work but is probably worth it every 8-10 years to remove built up crud.
kuksul08 is online now   Reply With Quote
Old 12-20-2018, 11:34 PM   #2
ST Guy
Veteran
 
ST Guy's Avatar
 

Join Date: Nov 2006
Location: South Bay
Motorcycles: Honda ST1100 ABS (tweaked here and there)
Name:
Oh...my....
__________________
It's not the answer that enlightens, but the question. - Eugene Ionesco

Let us not pray to be sheltered from dangers but to be fearless when facing them. - Rabindranath Tagore

A mind all logic is like a knife all blade. It makes the hand bleed that uses it. - Rabindranath Tagore
ST Guy is offline   Reply With Quote
Old 12-21-2018, 04:18 AM   #3
Pushrod
Veteran
 
Pushrod's Avatar
 

Join Date: Feb 2008
Location: Central Florida
Motorcycles: VTR, R100RS,CB500
Name:
Truth.
Pushrod is offline   Reply With Quote
Old 12-21-2018, 07:50 AM   #4
Junkie
gone for now
 
Contributor + 3%

Join Date: Aug 2006
Location: n/a
Motorcycles: n/a
Name:
Yep. I had to make new pistons for my Braking caliper because they were NLA (or spend $400 on a new caliper).
Junkie is offline   Reply With Quote
Old 12-21-2018, 08:33 AM   #5
bmwbob51
BMWBOB
 
bmwbob51's Avatar
 

Join Date: Apr 2008
Location: Hollister
Motorcycles: 2014 BMW 1200GS 74 Norton Commando
Name: Bob
Every new motorcyclists should take a DIY course. I wish I did way back when. I didn't have a clue how to take care of a bike!
bmwbob51 is offline   Reply With Quote
Old 12-21-2018, 09:04 AM   #6
auntiebling
megalomaniacal troglodyte
 
auntiebling's Avatar
 
BARF Moderator (ooh, fancy!)
Barfie Winner 2017
Contributor

Join Date: Apr 2004
Location: atop the parapet
Motorcycles: .
Name:
+1
any bike that "ran when parked" will need a brake system rebuild. guaranteeeeed.

Quote:
Originally Posted by Junkie View Post
Yep. I had to make new pistons for my Braking caliper because they were NLA (or spend $400 on a new caliper).

i've been on forums where if you suggested doing this, people would literally explode. "brakes are magic pixie dust powered by hopes and dreams, thoughts and prayers for you!"

usually from the old guys
__________________
no shirt, no shoes: No dice BARF TOS
every book is a children's book if the kid can read
-mitchbarf memes
my dad is an engineer
17/38 sprockets
CARB bikes list CA DMV fee calculators

Classifieds Forum Rules
Quote:
Originally Posted by Abacinator View Post
Love that subway tile backsplash, auntie
auntiebling is online now   Reply With Quote
Old 12-21-2018, 09:30 AM   #7
Junkie
gone for now
 
Contributor + 3%

Join Date: Aug 2006
Location: n/a
Motorcycles: n/a
Name:
I mean, I made them out of 316 stainless, on a lathe

not like I did it ghetto
Junkie is offline   Reply With Quote
Old 12-21-2018, 09:33 AM   #8
kuksul08
Suh Dude
 
kuksul08's Avatar
 

Join Date: Mar 2014
Location: Hoon Valley
Motorcycles: Whee!
Name:
Quote:
Originally Posted by Junkie View Post
I mean, I made them out of 316 stainless, on a lathe

not like I did it ghetto
I have thought about making them before. How did you get the surface finish good enough? Stock pistons are ground within .02mm and chromed.
kuksul08 is online now   Reply With Quote
Old 12-21-2018, 09:49 AM   #9
Junkie
gone for now
 
Contributor + 3%

Join Date: Aug 2006
Location: n/a
Motorcycles: n/a
Name:
Quote:
Originally Posted by kuksul08 View Post
I have thought about making them before. How did you get the surface finish good enough? Stock pistons are ground within .02mm and chromed.
the pistons I replaced weren't chromed or ground, or all that round for that matter
Junkie is offline   Reply With Quote
Old 12-21-2018, 09:57 AM   #10
auntiebling
megalomaniacal troglodyte
 
auntiebling's Avatar
 
BARF Moderator (ooh, fancy!)
Barfie Winner 2017
Contributor

Join Date: Apr 2004
Location: atop the parapet
Motorcycles: .
Name:
Quote:
Originally Posted by Junkie View Post
I mean, I made them out of 316 stainless, on a lathe

not like I did it ghetto
I figured. People get all wound up because... they do
__________________
no shirt, no shoes: No dice BARF TOS
every book is a children's book if the kid can read
-mitchbarf memes
my dad is an engineer
17/38 sprockets
CARB bikes list CA DMV fee calculators

Classifieds Forum Rules
Quote:
Originally Posted by Abacinator View Post
Love that subway tile backsplash, auntie
auntiebling is online now   Reply With Quote
Old 12-21-2018, 10:14 AM   #11
msethhunter
Veteran
 
msethhunter's Avatar
 
Contributor

Join Date: Apr 2011
Location: SoCal
Motorcycles: '98 VTR1000F, she's a fatty! '89 YSR 50 with a 150, she said "it's so cute!"
Name: Mikey
Quote:
Originally Posted by kuksul08 View Post
Over the years I have worked on a few old motorcycles (not that old, but 15-35 years range), and there is one common issue I see with every single brake system. The brake fluid is old, crusty, gelatinous, brown-ish, black-ish crap. Then, the seals get distorted, the pistons corrode, and the internals corrode.

I have met people who didn't know you even had to change your brake fluid!

You should change your brake fluid completely every 2-3 years at a minimum.


Here's my latest project and what I'm dealing with. This caliper had to be completely replaced.


It only takes 30 minutes to get some new fluid in there. A complete rebuild and flush takes more work but is probably worth it every 8-10 years to remove built up crud.
Quality fluid will last longer than 2-3 years. But like you say, it's cheap insurance. I'd rather replace good fluid, than replace everything else plus bad fluid.
__________________
I may seem like an asshole, but I'm mostly just a sarcastically driven prick. It's not personal.
msethhunter is offline   Reply With Quote
Old 12-21-2018, 10:36 AM   #12
GPzPop
Ask me about my B-1-D
 
GPzPop's Avatar
 
AMA #3295113
Contributor ++ 2%

Join Date: Nov 2005
Location: L i b m o
Motorcycles: zzr & xsr
Name: Simon
change my brake fluid into what ?
__________________
Rust is my thread locking agent
*
1 Thessalonians 5:8 "But since we belong to the day, let us be self-controlled, putting on faith and love as a breastplate, and the hope of salvation as a helmet."
GPzPop is offline   Reply With Quote
Old 12-21-2018, 11:04 AM   #13
kuksul08
Suh Dude
 
kuksul08's Avatar
 

Join Date: Mar 2014
Location: Hoon Valley
Motorcycles: Whee!
Name:
Quote:
Originally Posted by Junkie View Post
the pistons I replaced weren't chromed or ground, or all that round for that matter


Quote:
Originally Posted by msethhunter View Post
Quality fluid will last longer than 2-3 years. But like you say, it's cheap insurance. I'd rather replace good fluid, than replace everything else plus bad fluid.
I think 2-3 years is a general rule. A vehicle in Arizona is probably better off than one in Washington in terms of water absorption.

I've seen brand new brake fluid (ATE TYP 200) turn brown in a reservoir in as little as 4 months.

Quote:
Originally Posted by GPzPop View Post
change my brake fluid into what ?
Fairy dust?

Last edited by kuksul08; 12-21-2018 at 11:05 AM..
kuksul08 is online now   Reply With Quote
Old 12-21-2018, 11:11 AM   #14
Junkie
gone for now
 
Contributor + 3%

Join Date: Aug 2006
Location: n/a
Motorcycles: n/a
Name:
when I say not all that round, I think there was around 3/4 of a thou variation in diameter depending on where I measured. could be some of it was wear.
Junkie is offline   Reply With Quote
Old 12-25-2018, 12:58 AM   #15
ratsblast
Veteran
 
ratsblast's Avatar
 

Join Date: Sep 2013
Location: Belmont
Motorcycles: Buell BeLast, steal it, I dare you! 1997 1200xlh
Name: Daryn
Yucky, only nice thing about Harley using Dot 5 is I guess it doesnt gel up as bad as Dot4 because it wont absorb the moisture. I did a good bleed when I replaced the front brake system on the Harley and it really improved braking.
ratsblast is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 07:52 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.