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Rx100 Rear Brake Problem - What could be the issue?

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  • #1

    Rx100 Rear Brake Problem - What could be the issue?

    Hi All
    I hear sqeuaking noise when I apply the rear brake & the braking is not effective. To be frank, I don't feel the braking at all. If it were not the front disc, I would've crashed.

    So, I replaced the rear brake shoes (previous one changed 4400Kms ago), cleaned the inner rear drums (new drum replaced at about 7000 Kms ago), filed the inner drum for little friction; in addition tightened the chain a little bit; but no improvement noticed.

    I don't know what could be the problem. Can someone help me with your experiences as what else could I look in for? Thanks.

    PS - I'm a sort of DIY guy & enjoy working on bikes.
    Skill is what keeps you on a Motorcycle
    Awareness + Skill is what keeps you out of harm's way
    ATGATT + Awareness + Skill means you might Live To Ride another day
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  • #2
    Query Approved.
    :)

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    • #3
      sometimes, opening it up and giving it a good pressure wash helps. maybe some fluid leaked in.

      i am assuming the brakes are adjusted properly.

      after putting in new pads, i stamp the brake down brakes to brake in the shoes and bed them properly. sometimes, prolonged low pressure usage or dragging brakes glaze the shoes and render then the finish like glass.
      Abhishek

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      • #4
        Originally posted by braindead View Post
        i am assuming the brakes are adjusted properly.
        I couldn't get this point. I've adjusted the rear pin in such a way that there is minimal friction (not the least).

        Originally posted by braindead View Post
        after putting in new pads, i stamp the brake down brakes to brake in the shoes and bed them properly. sometimes, prolonged low pressure usage or dragging brakes glaze the shoes and render then the finish like glass.
        Yes, I did this one.
        Skill is what keeps you on a Motorcycle
        Awareness + Skill is what keeps you out of harm's way
        ATGATT + Awareness + Skill means you might Live To Ride another day

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        • #5
          inspect the brake shoes for wear. See if the brake pad is wearing out evenly or only half pad is being worn out. This could be due to a worn out cam lever.

          Also did you dismantle the brake hub any time recently??? the fitting of the brake actuator ( the part to which the brake rod connects) to the cam could be out of alignment ( as in not slotted in the right slot, maybe a lil before or a lil after the right slot).


          My offerings to the gods of speed -

          - KTM Duke 200
          - Yamaha RXZ 5 speed


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          • #6
            Originally posted by jd666 View Post
            inspect the brake shoes for wear. See if the brake pad is wearing out evenly or only half pad is being worn out. This could be due to a worn out cam lever.
            Dude the brake shoes are brand new - so no question of wear & tear. There is a seldom difference between the old & new. I'll try to upload the pics today evening. The old one is almost not worn out & there is no uneven pattern of wear & tear, I'm sure it can still be used for several 1000 Kms. I changed it just to clear my inhibition of brake shoes being worn out.

            Originally posted by jd666 View Post
            Also did you dismantle the brake hub any time recently??? the fitting of the brake actuator ( the part to which the brake rod connects) to the cam could be out of alignment ( as in not slotted in the right slot, maybe a lil before or a lil after the right slot).
            Sorry, I'm confused & didn't understand. Could you elaborate pls? If you don't mind, can you help with some pics?
            Last edited by aargee; 01-11-2010, 12:04 PM. Reason: To provide more info
            Skill is what keeps you on a Motorcycle
            Awareness + Skill is what keeps you out of harm's way
            ATGATT + Awareness + Skill means you might Live To Ride another day

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            • #7
              Originally posted by aargee View Post
              filed the inner drum for little friction; in addition tightened the chain a little bit; but no improvement noticed.

              I don't know what could be the problem. Can someone help me with your experiences as what else could I look in for? Thanks.

              PS - I'm a sort of DIY guy & enjoy working on bikes.
              Never file your brake drum. It will wear out your brake pads very fast. Also rubbed off pad material will accumulate inside the drum in a very short time and this will reduce the braking effect.
              Is the replaced brake pads of the correct material? Wrong Pad material may effect the braking. Also when you install new pads, you should loosen the fulcrum pin, apply the brake to seat the pads correctly and then tighten the pin.
              sigpic

              Comment

              • #8
                Originally posted by sudharma View Post
                Never file your brake drum. It will wear out your brake pads very fast.
                Yes, you are right, but I would still love that sharp brakes.

                Originally posted by sudharma View Post
                Also rubbed off pad material will accumulate inside the drum in a very short time and this will reduce the braking effect
                Yes, I'm aware of this & this has been taken care. Thanks.

                Originally posted by braindead View Post
                i am assuming the brakes are adjusted properly
                This made me to think over entire evening yesterday & finally gave a shot at night & boom...that was the problem.

                What I did to fix was, tightened the rear pin until the wheels are slightly (very slightly) frictions/contact with the brake shoes & then literally stood on the brake pedal hard. This cleared off the friction & the rear wheel was smooth again with far improved braking. I already see a better braking, I'll give a hard test today when I ride back home from office.

                To my surprise I'd to turn the pin a lot more (will try to post the pic) than what I expected for a new drum & brake shoes.
                Skill is what keeps you on a Motorcycle
                Awareness + Skill is what keeps you out of harm's way
                ATGATT + Awareness + Skill means you might Live To Ride another day

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                • #9
                  Originally posted by aargee View Post
                  To my surprise I'd to turn the pin a lot more (will try to post the pic) than what I expected for a new drum & brake shoes.
                  Correct Pad material and the correct "seating" of the break shoes will give you the best perfomance.

                  PS
                  When you dismantle the Brakes, could you upload pictures here.(Me being a DIY guy like yourself would like to see the setup)?
                  sigpic

                  Comment

                  • #10
                    How old is the brake drum ? do post some pics of it.
                    "Engine tuning is not an exact science, but with some practice and patience you'll get comfortable with your skill and be able tune for any conditions mother nature throws at you"


                    Still the Boss -- RX 135

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                    • #11
                      Dude i too had the same problem.i always used the oem brake shoe,but i dont know why they run hard after 200km or so.this time i am using an aftermarket brake shoe mnfd by Arrow.These shoe are doing well and its has been 3000km+.
                      The RX are my soul.
                      1999- Rx135
                      1999- Bajaj Caliber
                      1998- RXZ
                      1994- Rx100
                      2012- Bajaj Discover 125ST

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                      • #12
                        Here's the pic...
                        Skill is what keeps you on a Motorcycle
                        Awareness + Skill is what keeps you out of harm's way
                        ATGATT + Awareness + Skill means you might Live To Ride another day

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                        • #13
                          Those brake lining looks ages old, change the entire lining to new.
                          "Engine tuning is not an exact science, but with some practice and patience you'll get comfortable with your skill and be able tune for any conditions mother nature throws at you"


                          Still the Boss -- RX 135

                          Comment

                          • #14
                            Originally posted by psycho 98 View Post
                            Those brake lining looks ages old, change the entire lining to new.
                            Buddy are you sure? The hub was replaced a year back (say about 6000 Kms back), the brake shoes are new ones (bought say about 200-300 Kms back). Or did I get something incorrectly? Can you explain me with the pics pls? Thanks.
                            Skill is what keeps you on a Motorcycle
                            Awareness + Skill is what keeps you out of harm's way
                            ATGATT + Awareness + Skill means you might Live To Ride another day

                            Comment

                            • #15
                              Brake hub and brake lining assembly is different, The thing which i have marked in blue is the brake lining assembly, i told you to change that, hope you got the point ..
                              "Engine tuning is not an exact science, but with some practice and patience you'll get comfortable with your skill and be able tune for any conditions mother nature throws at you"


                              Still the Boss -- RX 135

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