What do ya think

[chiz]

Hey all
    Finally got around to removing front calipers removed the one on the drive side and got lucky. It would appear that the drive side front brake is the culprit that is causing my very annoying vibration when braking as the right side produced none of this effect.
The R1 calipers and discs are used off course what do you think could be the problem... bearing, mounting surface, rim, caliper or disc.. and quickest way to figure it out?
Thanks Lez 

[ZOA NOM]

If you don't feel it until you brake, I would suspect the disc. Check if there is any runout by setting up a fixed object close to the disc and spin the wheel to see if it is true (bike on center stand, and front wheel lifted). Maybe retorque the disc mounting bolts to see if the vibration reduces. Also, you could remove the disc and place it on a known flat surface to see if it is warped.

[chiz]

OK Thanks for the feedback hope I can get to the bottom of it. Strangely enough I have  VW tdi with the same problem after a half dozen new front discs and rears I have basically given up.
Lez 

[fj1289]

OK Thanks for the feedback hope I can get to the bottom of it. Strangely enough I have  VW tdi with the same problem after a half dozen new front discs and rears I have basically given up.
Lez 

For the car stuff - have you tried having a good set of USED OEM discs turned?  Usually the OEM discs are high enough quality they will take a "set" after being heat cycled.  Then will stay true after they are trued up on a brake lathe.  Much better solution than replacing them with off brand replacements.   

Chris

[aviationfred]

There was a post awhile ago of someone that had installed the Chinese Arashi wave rotors and mentioned similar vibration issues. The solution was that the rotors needed to be clocked exactly the same.


Fred

[chiz]

Ya Fred have the exact same rotors and clocking them has has not produced any change./ Have the bike up on centre stand with clock on rotor but have to figure out a way to keep the whole front end from moving when I turn the wheel.
Lez

[racerrad8]

Have the bike up on centre stand with clock on rotor but have to figure out a way to keep the whole front end from moving when I turn the wheel.
Lez

Mount the dial indicator to the fork and then check the run-out. I thought I had a photo of my set-up but I don't. I will try and get one later today.

Randy

[MOTOMYSZOR]

If You have no gauge You can use my "method" - small vice + caliper

[chiz]

Never did get to find out how much run out my disc has... frustrating with so many holes and slots. But I rotated the disc again a number of holes put some new pads on now all is good.
  Thanks for the input Lez