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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: vinceherman on June 29, 2022, 08:25:29 AM

Title: 2020 SR/F front brake pulsing
Post by: vinceherman on June 29, 2022, 08:25:29 AM
11.5k miles on my 2020 SR/F and I can feel the brakes pulse or surge with each revolution especially as you come to a stop.

I did search through the forum.  I will clean with denatured alcohol.  But in case I need to buy pads and rotors, I started looking at AF1Racing.
I could not find the rotor.
And I found many options for the pads.
Can anyone link me to the rotors and give advice on which pads to get?
I would rather have the right one than the cheapest one.

Edit:  I guess this is the rotor
https://www.af1racing.com/FRONT-320MM-CARRIER-ASSEMBLY-ZM25-08155
Title: Re: 2020 SR/F front brake pulsing
Post by: Richard230 on June 29, 2022, 07:55:29 PM
I have had good luck with EBC pads. Check the rotors to be sure that they are really warped by using a stiff wire attached to the forks and almost touching the brake disc. Rotate the wheel and observe by eye if there is any movement at the edge of the rotor that would indicated they are really warped.  They may be just covered with an uneven coating of pad material that alters the friction of the rotor at each revolution. A good cleaning of the rotor and the installation of new pads might be all that you need to fix your braking problem.
Title: Re: 2020 SR/F front brake pulsing
Post by: DonTom on June 29, 2022, 11:43:54 PM
11.5k miles on my 2020 SR/F and I can feel the brakes pulse or surge with each revolution especially as you come to a stop.

Edit:  I guess this is the rotor
https://www.af1racing.com/FRONT-320MM-CARRIER-ASSEMBLY-ZM25-08155 (https://www.af1racing.com/FRONT-320MM-CARRIER-ASSEMBLY-ZM25-08155)
I don't think that includes the rotor. Email them. Email address is shown here (https://www.af1racing.com/Zero-MCs-Front-Brake-Rotor-320mm-ZM25-08169) under "contact us".


-Don- Reno, NV
Title: Re: 2020 SR/F front brake pulsing
Post by: TheRan on June 30, 2022, 02:31:23 AM
That is the rotor, it matches up with the parts diagram
Title: Re: 2020 SR/F front brake pulsing
Post by: DonTom on July 01, 2022, 10:02:05 AM
That is the rotor, it matches up with the parts diagram
OIC. But I wonder why they call it: "CARRIER ASSEMBLY"


-Don-  Reno, NV
Title: Re: 2020 SR/F front brake pulsing
Post by: 2020_SRS_Commuter on July 07, 2022, 07:00:42 AM
There are threads here where a fellow , if I recall correctly he went by the user name nerveasy or some such, helped me and others with the same problem.

I had both front rotors warp within a few thousand miles. One was warped already when I left the dealer.
I replaced them both with new ones from AF1 and in a couple thousand miles, one of them had warped again and had cracks. I don't use the brakes much, much less abuse them, and I know how to ride a bike as I've been commuting on them daily for decades. I did nothing wrong. The brake disk material or fab process is utter rubbish.

Nerveasy's solution was to replace the Zero branded brakes with a substitute one made by EBC, and there are some different carrier bolts you need that come off an R1 or something like that.

At first, EBC sent me the wrong disks and it was because of my order that they corrected their parts catalog. You can find it in there now as the right number.

Since I did that, I had no more problems. Before you spend more money on these crap disks I suggest you look for that and consider it.

I've put about 20k miles on my EBC disks add pads and they are working as well as the day I put them on.

Good luck.