Welcome to NESR! Most features of this site require registration, including replying to threads, sending private messages, starting new threads, and uploading files. Click here to register.

Page 2 of 2 FirstFirst 12
Results 26 to 45 of 45

Changing brake fluid

  1. #26
    TRACK RAT!!!!! Pigman's Avatar
    Join Date
    Dec 2007
    Location
    Pembroke NH
    Posts
    6,994

    Re: Changing brake fluid

    Yea.................... the .1

    0 Not allowed! Not allowed!

  2. #27
    Infected Slyder's Avatar
    Join Date
    Jul 2007
    Location
    Concord, NH
    Age
    45
    Posts
    2,683

    Re: Changing brake fluid

    Quote Originally Posted by OreoGaborio View Post
    Oil, huh? Like keepin yer brake lines lubed?
    go hugga tree. brakes have oil, the fluid goes in the blinkers.

    I'd also like to invoke the 2am, was mostly asleep, clause. So I get a pass.

    1 Not allowed! Not allowed!

  3. #28
    rrrright down by da beach island boyeee's Avatar
    Join Date
    Jul 2009
    Location
    Quincy, MA
    Posts
    948

    Re: Changing brake fluid

    definitely try to get all the old fluid out. even though it's compatible, it will still boil before the 5.1, so you can get minor fade/bubbles from that.

    i use the RBF600 in my car and it's been great on the track. used to use the ATE, didn't notice any problems with that.

    0 Not allowed! Not allowed!
    08 Triumph Daytona 675, Jet Black w/ Gold
    dirty bike: 2015 KTM 250 XC-F

  4. #29
    Lifer Kurlon's Avatar
    Join Date
    Jun 2007
    Location
    Waterboro ME
    Age
    44
    Posts
    12,970

    Re: Changing brake fluid

    As long as you stay in a compatible system, IE DOT 3, 4, 5.1, ignore the DOT designator when comparing different options. Look at the actual boil temp rating. There are high quality 'DOT 4' labeled fluids that resist boiling better than cheapie 'DOT 5.1' labeled products, etc.

    0 Not allowed! Not allowed!

  5. #30
    Posting Freak xsiliconkid's Avatar
    Join Date
    Oct 2005
    Location
    Wrentham MA
    Posts
    945

    Re: Changing brake fluid

    Quote Originally Posted by tropicoz View Post
    I've heard of ziptying the lever, what does that do?
    Nothing good!
    I see folks doing this,overnight. They say the next day the brake lever feels,"less spongy".
    The only reason the lever feels harder is due to the brake system o-rings have swollen

    0 Not allowed! Not allowed!
    Graham
    "If computers get too powerful, we can organize them into a committee that will do them in"

  6. #31
    Lifer nt650hawk's Avatar
    Join Date
    May 2006
    Location
    Rockland, Assachusetts U Know South Shore
    Age
    49
    Posts
    7,514

    Re: Changing brake fluid

    Yea,
    I've never been a fan of this proceedure. I could never see the benifit from it.

    0 Not allowed! Not allowed!
    Gino
    HAWK GT Racer Expert #929
    2012 CCS LRRS ULSB Champion
    2012 CCS LRRS P89 Champion
    2008 CCS ULSB National Champion
    ECKRACING Bridgestone Street & Competition Woodcraft MOTUL On Track Media Pine Motorparts Vanson Leathers

  7. #32
    #331 CBR929RE's Avatar
    Join Date
    Apr 2009
    Location
    Bridgewater, MA
    Age
    41
    Posts
    5,623

    Re: Changing brake fluid

    Quote Originally Posted by nt650hawk View Post
    Yea,
    I've never been a fan of this proceedure. I could never see the benifit from it.
    I've never understood it either. compressing the fluid/trapped air over night is better than just letting it sit? how that does that work? to me it actually seems like the wrong thing to do. when you compress the fluid the air now has to move through a denser material to try to rise to the top.

    0 Not allowed! Not allowed!

  8. #33
    Unsafe At Any Speeds Jim's Avatar
    Join Date
    Aug 2007
    Location
    :lurk:
    Posts
    12,219

    Re: Changing brake fluid

    you're forcing the bubbles to rise up to the master

    1 Not allowed! Not allowed!
    EX 105 : CCS Atlantic, Mid Atlantic, South East, Florida, and WERA
    Sponsors: Motul, Michelin/STS, K&N, Woodcraft

  9. #34
    #331 CBR929RE's Avatar
    Join Date
    Apr 2009
    Location
    Bridgewater, MA
    Age
    41
    Posts
    5,623

    Re: Changing brake fluid

    Quote Originally Posted by Jim View Post
    you're forcing the bubbles to rise up to the master
    so forcing the fluid (and anything else in the lines) downward forces stuff upwards. I don't hold a degree in physics but...



    if you leave it alone the air will still try to rise to the top over night. taping the lines will help more in my opinion

    1 Not allowed! Not allowed!

  10. #35
    Unsafe At Any Speeds Jim's Avatar
    Join Date
    Aug 2007
    Location
    :lurk:
    Posts
    12,219

    Re: Changing brake fluid

    it could be a myth, but it's suggested very often & it's worked for me in the past.

    0 Not allowed! Not allowed!
    EX 105 : CCS Atlantic, Mid Atlantic, South East, Florida, and WERA
    Sponsors: Motul, Michelin/STS, K&N, Woodcraft

  11. #36
    Posting Freak timmyho414's Avatar
    Join Date
    Apr 2011
    Location
    NH
    Age
    42
    Posts
    978

    Re: Changing brake fluid

    I can't think of anything bad that would happen but I see no good coming from it either.

    If you hold the lever down you will block off the bleed port trapping whatever is in the system in the system. If we are talking about one or two bubbles, I think you would be better off bumping the lever so the fluid moves back and forth and makes the air bubble come unstuck from the inside of the line/caliper/whatever. Then crack the bleeder at either the master or the caliper to let the air out. Sometimes it will work its way out the reservoir but I would not count on that.

    If the lever is so soft you can pull it to the bar you need to keep flushing it(or look for something else that could be wrong).

    If I can't see the difference in color, I do 1-2 reservoir (about 1/2-1 cup if I had to guess).

    0 Not allowed! Not allowed!
    Tim
    LRRS #44
    Superbike Services 44

  12. #37
    Posting Freak xsiliconkid's Avatar
    Join Date
    Oct 2005
    Location
    Wrentham MA
    Posts
    945

    Re: Changing brake fluid

    the theory is...as fluid does not compress with pressure but gas goes...the trapped air bubbles will decrease in size and possibly work their way up easier.
    Constant pressure on the Orings on the pistons in the master cylinder and calipers for an extended period will actually deform them (swell). The next day the lever feels solid,not due to less air bubbles but due to temporry distorted oring seals

    0 Not allowed! Not allowed!
    Graham
    "If computers get too powerful, we can organize them into a committee that will do them in"

  13. #38
    AM #152 tropicoz's Avatar
    Join Date
    Apr 2010
    Location
    Maine
    Age
    46
    Posts
    448

    Re: Changing brake fluid

    Quote Originally Posted by Jim View Post
    brett, talk to me before ordering RBF600
    can I talk to you too?

    0 Not allowed! Not allowed!

  14. #39
    Super Moderator OreoGaborio's Avatar
    Join Date
    May 2004
    Location
    MA
    Age
    42
    Posts
    37,977

    Re: Changing brake fluid

    Quote Originally Posted by xsiliconkid View Post
    the theory is...as fluid does not compress with pressure but gas goes...the trapped air bubbles will decrease in size and possibly work their way up easier.
    Constant pressure on the Orings on the pistons in the master cylinder and calipers for an extended period will actually deform them (swell). The next day the lever feels solid,not due to less air bubbles but due to temporry distorted oring seals
    What did the o-ring say to the distorted seal?





    "Go clubbin?"

    0 Not allowed! Not allowed!
    -Pete LRRS/CCS #81 - ECK Racing, TonysTrackDays
    GMD Computrack Boston | Pine Motorparts/PBE Specialists | Phoenix Graphics | Woodcraft | MTag-Pirelli | OnTrack Media

    The Garage: '03 Tuono | '06 SV650

  15. #40
    Super Moderator OreoGaborio's Avatar
    Join Date
    May 2004
    Location
    MA
    Age
    42
    Posts
    37,977

    Re: Changing brake fluid

    Quote Originally Posted by xsiliconkid View Post
    the theory is...as fluid does not compress with pressure but gas goes...the trapped air bubbles will decrease in size and possibly work their way up easier.
    Constant pressure on the Orings on the pistons in the master cylinder and calipers for an extended period will actually deform them (swell). The next day the lever feels solid,not due to less air bubbles but due to temporry distorted oring seals
    What did the brake fluid say to the distorted seal?



    "Go clubbin last night?"

    0 Not allowed! Not allowed!
    -Pete LRRS/CCS #81 - ECK Racing, TonysTrackDays
    GMD Computrack Boston | Pine Motorparts/PBE Specialists | Phoenix Graphics | Woodcraft | MTag-Pirelli | OnTrack Media

    The Garage: '03 Tuono | '06 SV650

  16. #41
    Posting Freak timmyho414's Avatar
    Join Date
    Apr 2011
    Location
    NH
    Age
    42
    Posts
    978

    Re: Changing brake fluid

    Quote Originally Posted by xsiliconkid View Post
    the theory is...as fluid does not compress with pressure but gas goes...the trapped air bubbles will decrease in size and possibly work their way up easier.

    Constant pressure on the Orings on the pistons in the master cylinder and calipers for an extended period will actually deform them (swell). The next day the lever feels solid,not due to less air bubbles but due to temporry distorted oring seals
    Gotcha. air get compressed, moves easier. I still think cycling the system would be a better approach. I know you are not promoting the hold lever down method.

    I'm not sure I buy that it would distort the rubber bits, but if you have seen it I'll take you word.

    I'm going to ask around about this one.

    0 Not allowed! Not allowed!
    Last edited by timmyho414; 07-02-12 at 04:19 PM.
    Tim
    LRRS #44
    Superbike Services 44

  17. #42
    Infected Slyder's Avatar
    Join Date
    Jul 2007
    Location
    Concord, NH
    Age
    45
    Posts
    2,683

    Re: Changing brake fluid

    If air bubbles are trapped in the FLUID (hi Oreo ) putting them under pressure might not loosen them and allow them to rise. tapping lines, tapping master / calipers would in that case knock them lose whereas the zippy tied lever didn't.

    I mentioned one bad thing that can happen. Fresh washers, torqued banjos and fluid, not oil, on the banjo about to drip on the fairing. I left a rag under the master / banjo just in case, glad I did. I really didn't notice a difference in lever feel after the zip tie idea, compared to before. Though Jim is right, it is mentioned a lot. And like I said, the radial nissin master on the gixxers is junk IMO. So perhaps that's why I didn't notice a change.

    0 Not allowed! Not allowed!

  18. #43
    Unsafe At Any Speeds Jim's Avatar
    Join Date
    Aug 2007
    Location
    :lurk:
    Posts
    12,219
    Well I found a lot of air in the left caliper, so I did like 4 more cup refills. I think it's as good as it'll get for now. I'll have to re-bleed after Friday's practice.

    0 Not allowed! Not allowed!

  19. #44
    Unsafe At Any Speeds Jim's Avatar
    Join Date
    Aug 2007
    Location
    :lurk:
    Posts
    12,219
    Quote Originally Posted by tropicoz View Post
    can I talk to you too?
    No, slow down rookie

    0 Not allowed! Not allowed!

  20. #45
    Member ecd2004's Avatar
    Join Date
    Apr 2010
    Location
    New Hartford/Colebrook, CT
    Age
    32
    Posts
    230

    Re: Changing brake fluid

    Quote Originally Posted by OreoGaborio View Post
    What did the brake fluid say to the distorted seal?



    "Go clubbin last night?"

    oh jesus...

    0 Not allowed! Not allowed!

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Replies: 5
    Last Post: 07-16-14, 07:32 PM
  2. Brake Fluid
    By oVTo in forum Bike Maintenance
    Replies: 5
    Last Post: 05-26-09, 08:35 AM
  3. Changing Brake fluid?
    By Josephd14 in forum Bike Maintenance
    Replies: 17
    Last Post: 03-10-07, 08:27 PM
  4. Brake fluid etc.
    By OreoGaborio in forum General Bike Related
    Replies: 12
    Last Post: 11-11-05, 02:58 PM
  5. brake fluid
    By double agent in forum Bike Maintenance
    Replies: 8
    Last Post: 04-23-05, 03:56 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •