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Thread: [Help Me] Weak front disc brake on SZ-R

  1. #1
    Rusted
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    Default [Help Me] Weak front disc brake on SZ-R

    Hello All,

    I have been facing problem with front disc brake since I purchased my SZ-R. When I showed this problem at the first service they said disc brake will be fine after 1K to 1.5 K kms.

    Then I moved to Pune and gave the bike for 2nd and 3rd servicing at YFS Pune, asking them to fix the front disc, it wasnt fixed. Yesterday completed 4th servicing and again asked them to fix the front disc it wasnt.

    The problem with the disc brake is it is not sharp, it doesnt have any bite in it. I have to pull the brake lever hard to get it working as expected. My bikes rear brakes are sharper than the front disc.

    Now What should I do? I tried escalating this with Yamaha but YFS ended up giving some useless reasons. I also cleaned the disc with soap water let it dry and took a test ride still same problem.

    Need you all suggestion on below points -

    - What should I check to get the disc working as expected?
    - Do I need to get disc pad / brake oil etc replaced?
    - What can be possible reason for poor bite of front disc?

    Please help me with this, I am fed with Yamaha YFS servicing, shall I approach outside mechanic to get it checked? Would it void any kind of warranty? Rest everything is perfect with my bike, just this front disc is having problem.

    - Lalit

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    Super Moderator Noor's Avatar
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    Query approved
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    Questions to you Lalit...
    1. How're you sure that the front brakes can be improved? Have you tried riding another SZ or may be FZ (as they share the same brake setup) This is not a question to your knowledge, but, trying to eliminate a possibility.

    2. Is it that you have to pull your front lever harder for braking OR no matter however you pull, the braking is ineffective?

    3. Open the master cylinder & check the color of the brake oil. Is it bright red or yellowish & dirty?

    4. If there're issues, then they could be at...
    a. The piston at the front lever
    b. The worn out brake pads (which is highly unlikely 'cause I believe you would've done not more than 10K)
    c. Inadequate or poor quality of brake oil
    d. Air bubbles inside the brake hose
    e. Jammed pistons at the caliper
    So the key is to identify where the issue lies without which the braking cannot be improved, if there's a genuine issue.
    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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    Quote Originally Posted by aargee View Post

    4. If there're issues, then they could be at...
    a. The piston at the front lever
    b. The worn out brake pads (which is highly unlikely 'cause I believe you would've done not more than 10K)
    c. Inadequate or poor quality of brake oil
    d. Air bubbles inside the brake hose
    e. Jammed pistons at the caliper
    So the key is to identify where the issue lies without which the braking cannot be improved, if there's a genuine issue.
    f. oil, grease or any other lubricant on your front disc?
    Always assume the other guy will mess up - Ride Defensively!

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    Quote Originally Posted by rkakkar View Post
    f. oil, grease or any other lubricant on your front disc?
    He said this...

    Quote Originally Posted by lsp2310 View Post
    I also cleaned the disc with soap water let it dry and took a test ride still same problem.
    and I take the ASC would've cleaned the brake pads.
    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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    me too having issues wid my cbz-x 2011, my disc brakes aren't that effective. wen i press it gives sound as if its being rubbed by a hard stone. jus let me know if my brakes are allright? it wasnot the case earlier but i asked SVC guys to loosen it a bit, dat may b d issue??
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    Quote Originally Posted by aargee View Post
    He said this...



    and I take the ASC would've cleaned the brake pads.
    DOH! My bad
    Always assume the other guy will mess up - Ride Defensively!

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    Quote Originally Posted by Noor View Post
    Query approved
    Thanks a lot Noor for your approval.

    Quote Originally Posted by aargee View Post
    Questions to you Lalit...
    1. How're you sure that the front brakes can be improved? Have you tried riding another SZ or may be FZ (as they share the same brake setup) This is not a question to your knowledge, but, trying to eliminate a possibility.

    2. Is it that you have to pull your front lever harder for braking OR no matter however you pull, the braking is ineffective?

    3. Open the master cylinder & check the color of the brake oil. Is it bright red or yellowish & dirty?

    4. If there're issues, then they could be at...
    a. The piston at the front lever
    b. The worn out brake pads (which is highly unlikely 'cause I believe you would've done not more than 10K)
    c. Inadequate or poor quality of brake oil
    d. Air bubbles inside the brake hose
    e. Jammed pistons at the caliper
    So the key is to identify where the issue lies without which the braking cannot be improved, if there's a genuine issue.
    Hi Aargee,

    Have you completed your epic journey? Kudos to you and your machine! Truely amazing!

    1. I have ridden Fazer for good 30 kms on mixed environment city and highway, and braking of Fazer is top notch! The brakes are sharp on my friends fazer, if you ask me the comparision i would say my SZ-R brakes are not even 10% of that Fazer. I will try and get a test ride of another SZ-R to check braking on it but not sure about it though.
    2. Yes I need to pull the lever hard for braking, if I pull it hard the brakes works fine. What I can say it is, that the brakes are spongy, i mean when we apply front disc from stand still to some movement it should stop immediately with a jerk which happens in case Fazer but in my case it is like applying a drum brake and just a note my bikes rear drum brakes are sharper than the front disc.
    3. The oil in the master cylinder is Red.
    4. Yes my bike did not run much nearly 3200 kms (I know its very less :P), the front wheel rorates just fine when I put bike on main stand.

    I got a call from YFS Pune yesterday about the servicing and I showed my disappointment towards the lack of work on front brake, I called them again today, they will be giving me a call on this later today evening.

    Also I would like to seek an advice, what if Yamaha says they cant do anything with it? Should I approach local mechnic?

    The reason I am disappointed and worried about front brake is, I use front brake most of the time and the best part is they are made by Bybre and still without any bite!

    - Lalit

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    Quote Originally Posted by lsp2310 View Post
    Have you completed your epic journey? Kudos to you and your machine! Truely amazing!
    Tks for asking & your kind words; I don't know its epic or not, but its just another ride & its completed & hope you've seen the T'Log - http://www.xbhp.com/talkies/tourer/1...here-ride.html

    Quote Originally Posted by lsp2310 View Post
    I need to pull the lever hard for braking, if I pull it hard the brakes works fine. What I can say it is, that the brakes are spongy
    Looks like the issue is with the piston at the brake lever OR air inside the hose OR the pistons at the caliper are getting jammed & not releasing soon as expected.

    Quote Originally Posted by lsp2310 View Post
    Also I would like to seek an advice, what if Yamaha says they cant do anything with it? Should I approach local mechnic?
    If its still under warranty, push for it without spoiling your reputation; avoid paying out of your pocket.
    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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    Quote Originally Posted by itssaurabh.negi View Post
    me too having issues wid my cbz-x 2011, my disc brakes aren't that effective. wen i press it gives sound as if its being rubbed by a hard stone. jus let me know if my brakes are allright? it wasnot the case earlier but i asked SVC guys to loosen it a bit, dat may b d issue??
    sounds like your brake pads are worn out, better get it checked at svc before you damage your disc plate

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