Trying to stop brake judder on front Juicy 3. Have sanded pads, centered caliper and tightened disc bolts. Also checked headset and qr. It still judders. Anyone got any ideas?

you’ve probably warped the disc. Replacing the disc is the only cure i’ve found.

My elixirs do this. Don’t know why.. new brakes!

Id say its still your pads

Did you bed them in properly after sanding them?

Not my bike and only about 6 months old with light use. Pads probably not bedded in from new, which is why I sanded and bedded in this morning. Disc fine, not warped.

loose headset?

I had this. Turns out I had contaminated my rotors with furniture polish. I used neat Fenwicks on my rotors followed by meths. I cleaned the pads by putting a blob of swarfega on one of the pads and rubbing them together, I then sanded them.