My 2015 Ultra Limited has 2,200 miles on it and this started at ~2,000 miles. Anyone else experiencing what I'll describe as an intermittent vibration or groaning on lite to moderate braking from approximately 25 MPH down to 10 MPH? The brakes don't need to be hot on my bike to do this, but it will not do it when cold. Also it is not consistent. It occurs on an average of maybe 1 out of 5 or 6 applications. There is no visible scoring on the rotors. I'm thinking that one of the Rotors is slightly warped causing the pads to walk on the Caliper Pistons. (This sets up a brake squeal on passenger cars.) Anyone else have any experience with this symptom before I go to the effort of micing the rotors for parallelism and/or warp?

 

2014 FLHTK. The exact same thing was happening to me at about 1100 miles under the same (random?) conditions. It was intermittent, annoying and lasted for a couple of hundred miles and now it seems to have gone away.

 

They don't mention cleaning of rotors or pads in the little book. Use an approved ABS cleaner on both rotors & pads. Be careful with over spray onto any painted parts. You will be amazed how much dirt comes out.

 

Are you positive it's the front brake? At 25 mph the brakes are linked, and unless you let off they'll stay linked even down to 10.

 

Thank you, but yes it is one of the front brakes. I can't get it to do it with just the Foot Brake Pedal applied under any condition/speed/temperature/aggressiveness/etc. So I will need to see if the Front/Rear linkage is different with the Hand Brake Lever applied or when the Foot Brake Pedal is applied. I believe the balance (Front/Rear ratio) is different, but I'm not sure if one of the Front Calipers is inactive when the Foot Brake Pedal is applied. I know my Goldwing changes which Pistons in each of the Front Calipers are applied depending on how the Brakes are applied.

 

Mine is doing exactly the same thing for the past 2 weeks, intermittently. Of course it wouldn't do it for the dealer tech!

 

By the way, the dealer techs here say they've never heard of this problem. I described it to them as a groaning or grinding noise. I'm sure I can feel it through the front brake lever too.

 

Maybe try bedding the brakes in. I have to do this with my BMW M cars. The transfer of pad material onto the rotors gets uneven and acts like "warped" rotors. Here's good short 'n sweet instructional... http://ebcbrakes.com/articles/beddin...ds-and-rotors/

 

I have had this issue developed on my RGS from about 3500 miles, it's been into the dealers three times. At first I thought it was front brakes but in fact it does appear to be the rear, both have been cleaned several times yet it still does it albeit not as much as as said wont do it cold, needs to have warmed up and a certain style of braking again as mentioned..

 

Exactly, after a few hundred miles it will go away, you are dealing with floating rotors,and metallic pads on a metal rotor and or possible contamination of the pad, brake cleaner wont help. Those tiny grooves in your rotor match the pad surface, with floating rotors sometimes they "get out of sync" and have to wear in again.

But please check your pads, hardware and rotor bolts!