Fitted EBC Rotors and Pads, now it has a pulsing feeling when slowing down under a light pedal!

[RangerRick]

So I decided to upgrade the front brakes with EBC Rotors and EBC Brake pads. Wish I would have just left it alone, now it has a pulsing surging feeling when slowing down as in a warped rotor more so with slight brake pressure VS hard stopping, it does stop great but not smooth. So much for trying EBC, and yes I torqued the lug nuts to the factory specs.

 

[Woodaddict]

They say what you need to do is to ride, then do a few/multiple quick stops to bed them in. They might NOT be fully contacting the full pad.

 

[Mikey]

Did you do some heat cycles with them, or did you just take them out and run them? Did you clean the rotors with brake clean before install?

 

[JayBros]

Did you contact the source of the pads and rotors? That's the first place to begin IMO.

 

[Albec]

Did you do some heat cycles with them, or did you just take them out and run them? Did you clean the rotors with brake clean before install?

This!!!! ^^^^^

If the old rotors had any brake material left on them from the previous pads, it could result in what you're experiencing.

The old stuff on the rotors HAS to be removed. Do this first and then bed the brake pads in as suggested above.

 

[Jetfixer]

New rotors could not have any old pad residue. Still a good idea to clean them of any possible left over machine oil. EBC brakes have a very specific bedding in process that should be followed, not only to maximize braking power, but also to maximize their life.

 

[Albec]

New rotors could not have any old pad residue. Still a good idea to clean them of any possible left over machine oil. EBC brakes have a very specific bedding in process that should be followed, not only to maximize braking power, but also to maximize their life.

My bad, I guess that I should read for comprehension the next time around. I now see that the OP installed NEW rotors.

Never mind...

 

[RangerRick]

Thanks for all the responses. I did a few hard stops but will re-read the instructions of how to do it exactly.

 

[BajaRon]

Thanks for all the responses. I did a few hard stops but will re-read the instructions of how to do it exactly.

We used to have this issue before EBC started beveling the center hole on the rotors. With the original straight cut opening there was an interface conflict which would warp the rotors when torqued to the hub. But that issue has been solved. Still, if this persists, I would check to see that this hole has been beveled.

Be sure there isn't anything between the mounting surfaces (Rotor to Wheel Hub). A dial indicator gauge will tell you for sure if the rotors are not true.

Also, proper torque of the wheel lug nuts is important. As is the bedding in process, which has already been discussed. If you don't smell hot brakes, then the process has not been sufficient. And do not sit stopped with pressure on the pads with the hot brakes produced by the bedding in process. This will cause uneven cooling of the rotors and can cause warpage. Though admittedly, not likely with EBC rotors, it is still best to ride to cool them.

 

[RangerRick]

Will check for the bevel, and no I did not smell hot brakes, so I need to redo that procedure, Thanks for the Info

 

[2dogs]

There's a heat'm up, cool'm down procedure to unwarp warped rotors if that's your problem. Take a rotor off and lay it on a piece of glass to see if it's warped. It should contact the glass all the way around with no gaps showing. Good luck. A dial indicator could be used without removing a rotor, but securing it to a solid spot would be a problem.

 

[Little Blue]

Hopefully you are now following the correct steps for this project. Don't worry, I have been known to do things differently too.
Just the 'old school' brain/training issues.

Good Luck on your Mission.

 

[troop]

I used EBC HH sintered pads on my past (4) bikes, including a 2019 F3S. All pads made a "shish .. shish" sound, even after proper break in procedures. On my current 2022 RT S2S, I opted for EBC rotors to go with my OEM brake pads and I couldn't be happier. Great braking and no noise.