front brake grabbing

Discussion in 'Mechanics Garage' started by Lint, Aug 30, 2014.

  1. Lint

    Lint Member

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    Only at slow speeds. Regular riding is fine. Best I can tell, pads are ok, but I don't know how old, if that makes a difference. Can't tell if my bobbins on the rotors are bound up our free floating, as I don't have a reference. I may try and find a way to support the bike so I can pull the front wheel off. I can't quite see the pads.
     


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  2. skimad4x4

    skimad4x4 "Official" VFRWorld Greeter

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    Hi Lint

    I had a look back at past posts and I guess we are talking about brakes on an 05? Its worth updating your forum profile "Forum Actions" + "Edit Profile" to include at least the specs of your bike year/ABS? so it appears with all your posts and we know what your question relates to.

    As for the grabbing brakes issue - is this something new or has the bike always had it?
    Did you do anything else about the time this problem became apparent - fit new tyres(tires)? If so inspect that work - especially for anything loose!

    Before deciding what to do, my first action would be to put the bike on the centre stand on solid flat level ground. Get a friend to press down or sit on the pillion seat to raise the front wheel clear of the ground so you can closely inspect the state of the pads. Look closely for any signs of scoring on both side of both disks. Confirm there is ample depth left on the pads - especially the inboard ones which are hard to see with the wheel in situ. Once the wearing surface on the pads is worn out then you start to get metal on metal braking which will wreck your discs very quickly.

    If the pads and discs look fine you may want to check to see if there is a problem with the callipers - see this video - https://www.youtube.com/watch?v=Gjt_fQ4BcxU&list=UULPQanMaSMRas5gY1JCSaog

    If that checks out OK then check whether either of the brake rotors have warped. You need to sit on the floor in front of the bike and view the bike head on. You are looking to see if when the wheel is rotated the rotor runs true and the gap between the rotor and the fork leg is consistent. If the rotor appears to move side to side where it runs through the calliper then personally I wont take any risks with brakes (too safety critical) and will simply get the bike to the shop.

    Take care



    SkiMad
     


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  3. FJ12rydertoo

    FJ12rydertoo Member

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    How slow? 20 mph or walking speed? Is it a pulsing, or does the it feel like the brakes will lock up as soon as you pull the brake lever?
     


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  4. Lint

    Lint Member

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    I'll get someone to sit on the bike and check the pads again. The feeling is just on slow speed braking, feels like it suddenly grabbing, only for an instant, then the braking is normal. No pulsing and at higher than about 15mph. I rode the bike pretty hard last time and after that is when this started. May just be time for new pads. Maybe I overheated the pads on it.
     


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