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Thread: 1999 1100RT , rear brake rubbing on rotor

  1. #1

    1999 1100RT , rear brake rubbing on rotor

    just had new brake lines put on & rear caliper rebuilt 1200 miles ago.. while riding over weekend i stopped.. for whatever reason put my hand on rear rotor.. very very hot.. and my foot was no where near brake lever.. when i got home put bike on center stand.. looks like pads are rubbing in 1 spot of rotor when i slowly spin tire.. thoughts? a very good shop put the lines in, and have a very good reputation, I've been using shop for 10 years.. called owner, bringing bike in tomorrow.. I've checked fronts after ride.. they are hot, and should be.. i use them all the time.. rarely use rear.. FYI: rear master cylinder was not changed out..

  2. #2
    Registered User dieselyoda's Avatar
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    "Hot" is a relative term. Check the brake drums on a fully loaded semi from 60 MPH to 0, one application, and that is hot, but normal.

    I would be concerned if you had a dragging brake and that's easy enough to check. One hand, quick spin, you get a 1/4 turn, your fine.
    1997 R1100RT, 1981 KZ 440 LTD, R80RT, R90/6 sidecar, K1100RS,1983 K100RS (Cafe now)

    “The major civilizing force in the world is not religion, it is sex.”

  3. #3
    Holding hand on rotor for 5 seconds and almost burning .. without using rear brake ? Something is wrong I think

  4. #4
    MOA #24991 Pauls1150's Avatar
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    Too much fluid?
    Wrong pads?
    Master cylinder not allowing fluid to return when pedal is released? Pinched hose?
    Seals on pistons not allowing pad(s) to retract?

  5. #5
    Left Coast Rider
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    Quote Originally Posted by RICH7196 View Post
    I've checked fronts after ride.. they are hot, and should be.. i use them all the time.. rarely use rear..
    Are your brakes not linked? If they are that might account for the heat in the rear rotor after a stop.

  6. #6
    Gerard jagarra's Avatar
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    Couple of things come to mind, when the caliper was rebuilt did they clean and lubricate the pins both halfs of the caliper ride on, could be hanging up there. See if they adjusted the rear brake pedal, there should be play between the link from the pedal to where is goes into the master cylinder.
    1994 R1100RS-(5/93)-,1974 R90/6 built 9/73,--1964 Triumph T100--1986 Honda XL600R

  7. #7
    MOA #24991 Pauls1150's Avatar
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    It's been a while, but I thunk the 1100s had "partially-linked" brakes - the front brake lever also activates the rear brake, but the rear brake lever does not activate the front.
    Yeah, BC!
    So now Rich can ask "how hot should it get normally anyway"...

  8. #8
    Registered User m_stock10506's Avatar
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    Quote Originally Posted by Pauls1150 View Post
    It's been a while, but I thunk the 1100s had "partially-linked" brakes - the front brake lever also activates the rear brake, but the rear brake lever does not activate the front.
    Yeah, BC!
    So now Rich can ask "how hot should it get normally anyway"...
    Not sure how you meant your response.... perhaps the R1100S had some kind of linked brakes.
    However, the original poster has the R1100RT which I can assure you does not have linked brakes. Front and rear circuits are totally independent. The comment about the guide pins is spot on. If either of the two guide pins in the rear caliper has any corrosion the caliper halves will not move freely and will keep the pads against the rotor. This is easy to check.
    Michael Stock, Trinity, NC
    R1100RT, R100, R60/6

  9. #9
    MOA #24991 Pauls1150's Avatar
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    Thanks, Mike! I was actually writing "plural" there, not referring the "S" version ... but there have been a few iterations of the ABS over the years.

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