Brake judder and vibration
 

Hello guys
After replace the front brake pads (original pads) of my F4i, I get a strong vibration and judder when the brake system get hot.
I already replace head set but the problem remains.
The issue only happens if after a strong or long brake...

Thanks for your help

did you bed the pads in properly?

did you use proper double sintered pads, or...

are the rotors past wear limits?

its really hard to warp these rotors, but a dial gauge would help to determine that...

I only get the issue after 500 km with the new pads
I have the original pads from Honda
I already try with another complete wheel (inclunding rotors) but the problem remains

Thanks for your help

Are you feeling this In the brake lever or is the steering head jumping. If 1 then when was the last time you've flushed the brake fluid. If 2, check the steering head bearing.

No I don't feel it in the brake lever.
I replaced the steering head and the fork oil a week ago.
I replaced the brake fluid 2 month ago but is already very dark.

Thanks for your help

I've heard of brake lines expanding but you shouldn't get vibration. I used to bleed my F4i brakes often. I switched to EBC HH sintered pads and I used Valvoline fluid and steel braided lines. Be sure you're getting all the air out of the system.

Come to think of it, I have a complete F4i brake system setup for sale with Speedbleeders installed. I was happy with the functionality but went with the 954 system for looks and functionality. See the classified section.

Sorry I couldn't help diagnose. This is strange that it's only when hot. But water in fluid boils and rubber lines do expand but your description sounds extreme like warped rotors.

I have steel braided lines

Have you checked for any loose components? Can you take a video?

All the components have the correct torque.
Video?

Last weekend I removed the cover of brake fluid, and I see some condensation in the rubber part inside (the rubber part under the cover).
Is this normal or can this make the judder symptoms?

Thanks