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  1. #1

    Member #
    215
    Bike(s)
    2002 CBR1100XX
    Join Date
    Nov 05 2006
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    Milwaukee,WI
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    Put new brake pads on, front right caliper now rubs

    Took off my Galfer Greens and replaced with new pads. (hated the greens, they weren't worn out, but just didn't like them)

    Now the front right brake pads rub. I was careful replacing the pads not to bend the rotors or anything. Brakes were fine before the new pads.

    Its a very uniform consistent rub. not intermittent, but in a revolution of the wheel the sound is the same the whole way around.

    That front right rotor on a very short ride (4 minutes) got much hotter than the others. Not crazy hot, but very noticeably hotter.

    Only other thing i noticed was the front brake is REALLY stiff. use to be a fraction of an inch before the brake grabbed, but now just a slight pull on the front brake and it grabs hard.

    Do I need to bleed out brake fluid or something? I've never added fluid.

    Bike has 31,000 miles on it. This is my 3rd set of pads. Originals, then galfer greens, now these new ones.

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  3. #2

    Member #
    5464
    Bike(s)
    99 Blackbird 6mm shim, - center stand
    Join Date
    Mar 19 2009
    Location
    Texas
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    555
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    Re: Put new brake pads on, front right caliper now rubs

    did you maybe accidentally squeeze the brake leverwhen you had it disassembled?
    Everyone Dies. Not Everyone Lives.

  4. #3

    Member #
    215
    Bike(s)
    2002 CBR1100XX
    Join Date
    Nov 05 2006
    Location
    Milwaukee,WI
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    Re: Put new brake pads on, front right caliper now rubs

    No, I'm sure I didn't touch the brake.

    I did have a 'tiny' bit of difficulty getting the pads to slide in on that side. (I didn't take caliper off to put the pads on, I just took the lower bolt out and dropped the pads out. I wasn't sure if I hadn't compressed the cylinder far enough or something.

    I put the outside pad on, and then when i went to put the inside pad on, it was a tight squeeze, but I thought once the pads were in, it would seat/center itself when I applied brakes?

    Should I have taken the caliper off to put the pads on? Completely compress the pistons before replacing?

  5. #4

    Member #
    1728
    Bike(s)
    81,82,83 CBF's, 98 CBRxx, 07 CBR-1000RR/R, 83 FXSB
    Join Date
    Jun 03 2007
    Location
    Canada
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    Re: Put new brake pads on, front right caliper now rubs

    Item #1: It is somewhat normal with new pad installs that the caliper pistons will need to be pushed back into the caliper/s bores to allow for the thicker "new" brake pads to be installed with enough clearance for the brake rotor to pass between the brake pads. If your master cylinder fluid level was topped up at some point prior to the new brake pad install you may now have a master cylinder that is pushing the point of "over full". In a master cylinder with a limited amount of extra volume/space to work with you may in fact have a bit of pressure preloading going on. I would suggest you protect the body and paint work in the area of the front brake master cylinder and then very carefully remove the lid of same to check the level. If the M.C. is over full you most likely will get some spill over..ergo the paint and body work protection requirement. (brake fluid will remove paint!!) If the level is high you might try lowering it with a syringe to vacuum out the required amount. Also,..ensure the rubber MC lid expansion boot is fully retracted to the "un-expanded" condition.

    Second item: While the lid is off the M.C. If you can see to the bottom of the M.C. make sure both the fluid feed port and the pressure release port are clear. If the pressure release port is not clear brake pressure will not drop once you release the lever.

    Third idea: as relates to #1. You might also open the caliper bleed port/s and see if the caliper pressure drops and rotor clearance increases between the pads. If there is some pressure noted (a squirt of brake fluid perhaps?) it will be released and clearance should return. I'd still have a look inside the M.C. to check the level there also.

    One other issue: With the linked brake system it may be the rear M.C. level or brake system that is putting pressure on the front right caliper. I'd have to check the manual..but I think it's one piston on the front right caliper that gets pressure from the rear brake M.C. (need to check which caliper it is that gets pressure from the rear system)

    Still thinking out loud here: The other issue that may have presented is a stuck caliper piston/s in the caliper. This will require that the caliper be tore down and cleaned (often there is a hard "mung" behind the caliper piston seals that do not allow the piston/s to retract that micron of an inch to release the pads from the rotor/s. If this is the case most install a caliper rebuild kit which will supply new rubber seals rather then re-using the old seals. To clear the "mung" in the seal lands behind the seals I've used a motor tool (Dremel) at low speed with a brass mini-wire wheel to target the "mung". I do not touch the cylinder bores with this brush...just the seal lands only. You may need a dental mirror to really see this crap that gets into the seal land grooves that locate the seals. Doing a routine flush of the brake fluid system every now and again can help reduce this build up of crap in the system.

    HTH.

    Tony
    "Stemmata quid faciunt."

  6. #5

    Member #
    4578
    Bike(s)
    2001 CBR1100 XX
    Join Date
    Sep 20 2008
    Location
    Renton, WA
    Posts
    245
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    Re: Put new brake pads on, front right caliper now rubs

    Sounds like a stuck piston. If you have never changed your fluid, I would take it all apart, clean it very well, and completely flush the system with new fluid. Get a Mity Vac and make sure that the fluid that comes out is nice and clear, just like what is in the fresh bottle.
    Never use fluid from an open container. As soon as you pop the seal it will start to absorb moisture. Always use fresh fluid.
    Brake fluid should be changed yearly. It probably looks like root beer.

  7. #6

    Member #
    439
    Bike(s)
    '02 metalic cherry red CBR 1100 XX
    Join Date
    Nov 25 2006
    Location
    Vancouver BC Canada
    Posts
    12,652
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    Re: Put new brake pads on, front right caliper now rubs

    If you use a 5.1 hydrolic fluid, Motul or Motorex is my choice,you can get two years at least out of your hydrolic fluids. Why not use EBC HH pads? all imo, of course.

  8. #7
    A Rainbird Warrior
    Member #
    4721
    Bike(s)
    99 FI phoenix blue 1100xx
    Join Date
    Oct 15 2008
    Location
    Tasmania
    Posts
    5,154
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    22 times

    Re: Put new brake pads on, front right caliper now rubs

    I think you will find a caliper piston is not sliding properly, you may have fouled the rubber when pushing the pads in. Remove and install again making sure the pistons are moving freely and pushed fully back before inserting the pads.
    Life begins at 240kmph !

  9. #8

    Member #
    215
    Bike(s)
    2002 CBR1100XX
    Join Date
    Nov 05 2006
    Location
    Milwaukee,WI
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    Re: Put new brake pads on, front right caliper now rubs

    I removed the shims from the back of the brake pads and re-installed. It appears the new pads are just a fraction of an inch too thick to fit without friction. Once I removed the shims the brakes work perfectly. After a 1000 miles or so, perhaps I'll drop them out and put the shims back in once the pads have worm down a bit.

    Why not use EBC HH pads?
    That is precisely what I installed

  10. #9

    Member #
    1728
    Bike(s)
    81,82,83 CBF's, 98 CBRxx, 07 CBR-1000RR/R, 83 FXSB
    Join Date
    Jun 03 2007
    Location
    Canada
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    Re: Put new brake pads on, front right caliper now rubs

    One other item to check from the "I didn't know that" file. Ensure you re-installed the wheel (if you removed it for any reason) with the direction of rotation arrow on the tire pointing in the correct direction. If the wheel/tire was install backward you may find that the calipers/pads rub one side and not the other. The right and left side axle spacers are not the same if memory serves me. There was another member who had the tire installed to the wheel backward and then found the brakes also got rubbed the wrong way when he installed the wheel assembly to the forks so that the arrow on the tire rotated in the direction required. Any indicatior of sorts is the "L" and the "R" on the brake rotors..and the look of the three spokes...they should mimic the look of the rear wheel in the sprial spoke spin design,,,they sort of mimic that Isle of Man three legged design right? With a stock set up there is in fact a left side and right side to the front wheel and they only go on one way.

    New pads will of course be thicker then used ones...but if they are made of OEM spec's there should be no wear-in period required to allow them to fit and function normally on the bike. At least that has been my experiance with new pads on different Honda models including the XX and dated CB-F machines of the 1980's.

    Tony
    "Stemmata quid faciunt."

  11. #10
    Flyin' Lo and Free
    Member #
    1244
    Bike(s)
    1998 Honda CBR 1100XX Superblackbird
    Join Date
    Mar 28 2007
    Location
    Rio Rancho,NM
    Posts
    685
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    4 times

    Re: Put new brake pads on, front right caliper now rubs

    [quote=N1K;120414]I removed the shims from the back of the brake pads and re-installed. It appears the new pads are just a fraction of an inch too thick to fit without friction. Once I removed the shims the brakes work perfectly. After a 1000 miles or so, perhaps I'll drop them out and put the shims back in once the pads have worm down a bit.

    I had the same issue with mine last year...the shims made it difficult to slide the pads in...left them out and it was fine...I haven't put them back in yet...I think it's the usual case of aftermarket parts being just that little bit different from OEM...cheers.
    1998 CBR 1100XX Blackbird (Black, of course),PUIG Touring Windscreen, Corbin (style) Gunfighter/Lady saddle, Two Brothers C2 Aluminum Oval Slip Ons, Factory Pro Stage 1 jet kit, K&N Air Filter, VFR bars, Pazzo style levers, Hyperpro suspension kit, Pre-load adjustable fork caps from Jaws, Cortech saddle/tail bags, Dowco tank bag, more to come.

  12. #11

    Member #
    4351
    Bike(s)
    2005 Blue Blackbird, Silver 06,Now The Dead Moped,
    Join Date
    Aug 16 2008
    Location
    Lilydale Melb Australia
    Posts
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    Re: Put new brake pads on, front right caliper now rubs

    All very good info to keep in mind when I do mine. Thanks peeps.
    Cheers,
    Brian.
    If ya not boppin, Ya in ya coffin. Rock and Roll will soothe your soul.
    Mods, Double Bubble Windscreen, Ventura packrack, Expandable to 82 litre, Rjays rack bag, Suspension is still stock, Megacycle Cans, Hids, It Might be Blue, It Might be Slow, But it is, Awesome.


 

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