Brake Noise

Discussion in 'Wheels' started by Steve Di., Jun 15, 2010.

  1. Steve Di.

    Steve Di. Active Member

    221
    28
    1
    I just changed the rear brake pads on my Heritage and now have a low frequency vibration when making slow-speed stops. This vibration is strong enough to be felt through the bike's frame.

    Is this a bleeding issue? The reason I ask is I had to bleed the brakes twice to remove all the air in the system.
     
  2. Jack Klarich

    Jack Klarich Expert Member

    18,544
    153
    399
    Is this a pulsation? were the old pads worn at an angle? Possible warped rotor, or harmonic from no shims on pads or anti rattle clips
     
  3. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

    5,278
    133
    157
    It could be that the new pads are sticking a wee bit although i havent seen the newer types of brakes as my bikes are older
    just an area to look at

    Brian
     
  4. Steve Di.

    Steve Di. Active Member

    221
    28
    1
    There is no pulsing and the brake pedal feels firm. The vibration is more harmonic in nature and can be quite strong. I bought the pads from the dealership and am surprised that they didn't come with harmonic shims.
     
  5. Jack Klarich

    Jack Klarich Expert Member

    18,544
    153
    399
    Try some sil glide on the back of the pads it will help the harmonics:D
     
  6. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

    5,278
    133
    157
    I always paint the back of any brake pads with copper grease it sort of prevents harmonic vibration and so stops brake squeel and stops the pads from sticking to the piston

    Brian
     
  7. Steve Di.

    Steve Di. Active Member

    221
    28
    1
    Fin and Jack, I thank you for your quick responses....now to find some copper grease and sil glide.
     
  8. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

    8,176
    98
    16
    The pads should have come with the shims AND anti-rattle spring/retainer. I would check your kit for the Service Instructions which should be inside the box as well. It has a list showing what it comes with. Were the pads in the "Genuine HD" Box, wrapped in dessicant paper/sealed packaging with the HD Installation Notes neatly folded within?
     
  9. Steve Di.

    Steve Di. Active Member

    221
    28
    1
    You are correct, except the pads didn't come with shims and the instructions didn't mention shims. When I buy pads for my truck, they come with a small tube of blue anti-squeak paste.

    The next time I head to the H.D. dealer I will ask them about this. I will bet I have to buy the stuff separately.
     
  10. ironmark

    ironmark Junior Member

    754
    28
    4
    Go to the auto parts and get some Permatex Ultra Disc Brake Caliper Lube it is a synthetic lube ( item # 24110 ) . Paint the back of the disc brake pads with the permatex and all is good , the permatex is much better then the stuff that comes from HD and it last longer . Also there is no need to bleed your brakes when replacing the brake pads the piston on the caliper will push in easy without opening the bleeder or anything else that would allow air in the system .