Results 1 to 12 of 12

Thread: Do I need to remove the brakes and pads to bleed my whizzy brakes?

  1. #1
    Registered User tasslehawf's Avatar
    Join Date
    Feb 2016
    Location
    Austin, TX
    Posts
    75

    Do I need to remove the brakes and pads to bleed my whizzy brakes?

    I haven't made the wood block spacers. Will I damage my brakes if I just bleed them mounted on the discs?
    2014 Triumph Speed Triple
    2007 F800S
    2006 R1200RT

  2. #2
    Dress for fall & avoid it AlanColes's Avatar
    Join Date
    Aug 2013
    Location
    Bedford, Nova Scotia
    Posts
    1,082
    Quote Originally Posted by tasslehawf View Post
    I haven't made the wood block spacers. Will I damage my brakes if I just bleed them mounted on the discs?
    No, everything will be fine leaving the rotors and pads in place when you bleed the fluid.
    Regards, Alan - President BMWONS - BMWMOA/BMWRA/BMWONS/Airheads
    Current: 2019 R1250RT / '06 Ducati ST3s / '91 R100GS / '86 R80RT / '75 R90S / '73 850 & '70 750 Commando Prev: '14 R1200RT / '04 R1150RT / '81 Honda GL1100 / '77 Suzuki GS750 / '73 Norton 850 Commando

  3. #3
    Registered User AntonLargiader's Avatar
    Join Date
    Jul 2004
    Location
    Charlottesville, VA
    Posts
    2,162
    Why mess with them at all if you're not ready to do the work?
    Anton Largiader 72724
    Tech articles - YouTube
    Virginia Motorrad Werkstatt BMW motorcycle service and repair in central Virginia

  4. #4
    Aspiring Profligate Jeff488's Avatar
    Join Date
    Apr 2007
    Location
    Nacogdoches, TX
    Posts
    1,106
    Is there an advantage to using the blocks?
    I have some, but tend to not use them. It's obviously easier not having to take the calipers off.
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  5. #5
    Registered User BobbyB26's Avatar
    Join Date
    Feb 2015
    Location
    NW Washington
    Posts
    52
    I think the theory behind removing the calipers is that you can back the cylinders all the way up and push all the fluid out......that way when you flush, you get all the old out. That said, I didn't do that when I did mine...left em in place and went for it. To me, the little bit that was left in the cylinder wasn't worth it....others may say otherwise...

    BTW- You do know that it isn't a "run of the mill" job to bleed "whizzey" brakes! Takes some special tools and bleeding in the correct order is PDI (pretty durn important). I used the JVB tutorial and it went along smoothly. Also, you will need to remove the tank....sounds like a bigger deal than it really is, but is helpful if the tank is on the MT side....easier to lift off, set down.... All the fuel lines, elect and vent hoses have quick disconnects and/or plugs, so goes quicker than you'd think.
    2009 R1200RT
    2008 R1200RT (Wife rides....I fix)

  6. #6
    Quote Originally Posted by AntonLargiader View Post
    Why mess with them at all if you're not ready to do the work?



    my thoughts as well...

    Perhaps best to take it to a shop ?
    Ron Prior {AMA member ,MOA member}
    Milford,Oh
    2002 KLT
    2004 Roadster

  7. #7
    Aspiring Profligate Jeff488's Avatar
    Join Date
    Apr 2007
    Location
    Nacogdoches, TX
    Posts
    1,106
    Quote Originally Posted by BobbyB26 View Post
    I think the theory behind removing the calipers is that you can back the cylinders all the way up and push all the fluid out......that way when you flush, you get all the old out. That said, I didn't do that when I did mine...left em in place and went for it. To me, the little bit that was left in the cylinder wasn't worth it....others may say otherwise...

    BTW- You do know that it isn't a "run of the mill" job to bleed "whizzey" brakes! Takes some special tools and bleeding in the correct order is PDI (pretty durn important). I used the JVB tutorial and it went along smoothly. Also, you will need to remove the tank....sounds like a bigger deal than it really is, but is helpful if the tank is on the MT side....easier to lift off, set down.... All the fuel lines, elect and vent hoses have quick disconnects and/or plugs, so goes quicker than you'd think.
    I feel pretty much as you do about getting the last drop out. Clear fluid seemed good enough.

    Yep, I know about whizzy brakes. Done it a number of times. Not astrophysics, but tedious.
    Happily, now neither I nor anyone I know has a bike with them.
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  8. #8
    Registered User AntonLargiader's Avatar
    Join Date
    Jul 2004
    Location
    Charlottesville, VA
    Posts
    2,162
    FWIW, in a shop the calipers don't come off. The pads come out and then the spreading and blocking is done from the top. It isn't just the servo-assisted brakes, either; this applies to nearly everything after the classic ABS2 caliper. Push the pads fully back to reduce the retained fluid and then flush. ALL brakes should have the pistons pushed back for bleeding, but for older ones especially you have to take the caliper off for that.
    Anton Largiader 72724
    Tech articles - YouTube
    Virginia Motorrad Werkstatt BMW motorcycle service and repair in central Virginia

  9. #9
    Aspiring Profligate Jeff488's Avatar
    Join Date
    Apr 2007
    Location
    Nacogdoches, TX
    Posts
    1,106
    OK, that makes sense.
    Guess I'll make some wooden shims to move the pads back while still mounted. Not a big deal.
    Thanks, Anton.
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  10. #10
    Registered User David13's Avatar
    Join Date
    Nov 2011
    Location
    Utah
    Posts
    995
    You don't need to make them.
    You can go to Home Depot or some such place and buy them for very few dollars.
    dc

  11. #11
    Aspiring Profligate Jeff488's Avatar
    Join Date
    Apr 2007
    Location
    Nacogdoches, TX
    Posts
    1,106
    Yeah, but those are pine.
    I'll make mine from some scrap maple or cherry.
    What's a wood shop for if not to make neat stuff?
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  12. #12
    Registered User alegerlotz's Avatar
    Join Date
    Mar 2015
    Location
    Greater Los Angeles
    Posts
    293
    I did mine last week since I had to have the tank off for an alternator replacement. I was planning to do them at the next service anyway...

    I replaced the pads and the brake fluid at the same time. Personally, if I weren't have been doing the pads, I would have left the calipers on the bike. The extra amount of old fluid you'll get by backing off those pads is small and as you're bleeding the calipers most if not all of the old fluid is going to get sucked out anyway.
    2016 R1200RT
    2007 KTM 450 XC-W (10/17 - 5/18)
    2005 R1200RT (2/2015 - 12/2016)
    1985 Yamaha XJ 700 Maxim (7/1989 - 9/1991)

Posting Permissions

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