[oldbastard]

Due to my origibal front brake rotors being down to 3.7mm I recently tried some EBC brake rotors (x series wavy) and found that after running in, they vibrated badly when grabbed in earnest. At all speeds. Went down the usual route of changing (1 by 1) front tyre, wheel bearings, headstock bearings and brake pads,all to no avail. Honda original discs are no longer available so I've got some used discs still with 4mm on and straight, I expect these will fix the problem. But I wondered if any of you had experience with EBC....what struck me is that their rotors are not handed,whereas honda items are designated kept and right. I'm also not convinced by EBC's claim that their square buttons allow enough freedom for the disc to find its correct position. See pic.
Any info you might have would be appreciated... I hate this kind of mystery...I contacted EBC but received no reply..Big surprise...not.

 

[oldbastard]

Due to my origibal front brake rotors being down to 3.7mm I recently tried some EBC brake rotors (x series wavy) and found that after running in, they vibrated badly when grabbed in earnest. At all speeds. Went down the usual route of changing (1 by 1) front tyre, wheel bearings, headstock bearings and brake pads,all to no avail. Honda original discs are no longer available so I've got some used discs still with 4mm on and straight, I expect these will fix the problem. But I wondered if any of you had experience with EBC....what struck me is that their rotors are not handed,whereas honda items are designated kept and right. I'm also not convinced by EBC's claim that their square buttons allow enough freedom for the disc to find its correct position. See pic.
Any info you might have would be appreciated... I hate this kind of mystery...I contacted EBC but received no reply..Big surprise...not. View attachment 110878
[/QUOT

 

[oldbastard]

Left not kept

 

[oldbastard]

Ok, mystery solved. What I discovered was that after about 600km on the new EBC discs, they had developed disc thickness variation. In 2 places the thickness was up .015mm. Doesn't sound much but it's enough to rattle your fillings.
Now I'm pretty sure it's because I did not scrupulously clean the hub, there were a few places where there was loctite remnants proud of the flat surface,these are quite hard and I foolishly thought they would be flattened by the torque applied to the disc carrier screws. Apparently not, and this meant that the disc had some swash on it. Not a problem initially because the caliper pistons oscillated back and forth with the disc. But the force required to do that caused assymetric wear round the circumference of the disc, resulting in disc thickness variation. Lesson learned.

 

[Jaybird180]

Glad you got it sorted. I was going to head to the garage to get you the name brand of the Chinese-made wave rotors I have on my SC57. I'm quite happy with them.