Buy another set of discs...if theres no change then youve got a spare set....ive got pfm discs....best ive ever had and will continue to buy them...and, pull the calipers apart, clean the pistons and then regrease with red grease ....one thing at a time...then test..
Once I get the discs measured to see if they are warped. Then i think i will have to get the pistons in the caliper checked. Comfysofa, PFM discs? What brand are these? Never heard of them. Sorry for the ignorance.
PFM discs...here... http://www.thestopshop.co.uk/pfm-disc-shop/ High quality stuff...wish i could afford more of their stuff...about 500 quid for a set. All parts can be bought individually. Got them on my RSV4. Brilliant discs.
have you tried stripping pads out, re-cleaning and refitting? also grease/oil on a pad would cause juddering, check you havent contaminated them.
Because there may be a fair bit of difference in the amount of meat left on the pads ( the newer set compared to the older set ) . This would mean that the pistons are sitting in different positions in the bores of the calipers , both at the rest position and with the brakes full on . .... but ... " I'm just speculating on a hypothesis here , Tom " Name that movie ! ..... Other than that , I'm all out of ideas here . Best of luck though , but don't let a dealer do to you what they've done recently to a fellow forum member . .... I'll find that link in a minute https://www.ducatiforum.co.uk/threads/916-wont-rev-past-7k.70932/
Gents sorry if this sounds like a silly question but is it ok to use standard oem brake pads on a performance floating disc like the Galfers?
You might find this of interest. https://www.biketorqueracing.co.uk/pages/about/btr-tech-station/is-my-disc-warped.htm Went through all the measurements with a dial gauge and magnetic base attached to wheel spindle which is steel as you know. Also the vernier check on thickness variations. Stripped the callipers and rebuilt - even went further and bought new callipers. Also the bobbin clean - all fine. Basically everything that’s suggested on forums. In the end went for this at medium grit and transformed. http://www.flexhoneblog.com/2012/01/flexible-honing-for-motorcycle-brake.html
Hello Gents. I got the run out checked. Left disc was bent 0.4-0.5. On the outer edge. After speaking with a few technicians there opinion is they suspect that slowly over numerous times of changing the front tyre as the caliper is being removed from the disc it slightly bends the edge if a wee bit too much pressure is used removing it. So over the period of three years and numerous front tyre changes it bent to point that I could feel as excessive. Nothing to do but replace. Have decided to go with a set of Galfer Wave DF774CW. Friendly warning to all to take care removing your calipers from the disc as my damage didnt occur in one day. It was accumulated over a period of time.
That is absolute rubbish. Those discs are stopping 250kg or more of bike and rider from 200mph over and over again. There's no way you would put enought pressure removing calipers to have bent them just from removing them in normal use.
Having recently removed my front wheel, i did notice that you do have to put a bit of force on the outer edge of the disc to create enough space between the pads, to be able to remove the calipers. However, I'm pretty sure the force to push back the pads into the caliper is much much lower than the force needed to bend the discs.
I tend to agree. However the dial when checking the run out doesnt lie. The disc is bent on the outer edge. I can either get the disc machined back down to tolerances or just replace. Considering they have done 16K miles and are three years old I just bought a new set. Believe it or not It was Ducati mechanic that mentioned the caliper can bend the outer edge, they have experienced it. I would personally bet that the over the years whilst riding over pot holes and bumps at considerable speed it could have bent slightly or it was slightly off from factory and got worse. God knows. Im baffled TBH
