Quote:
Originally Posted by Luckypants
- Is this likely to be a sticky spot in the disk, rather than a warped disk?
- Will this wear off with use?
- How do you measure run-out on brake disks without special tools?
- what else could cause this?
- Is 24K miles reasonable mileage for front disks?
Useful posts only please about brakes and possible problems.
Thanks |
1) Possible, I've seen quite a few discs where the pad has rusted to the disk and left a 'high' spot
2) Yes but you may need *hard* use to do it. You may find getting them skimmed easiest and will verify they are flat.
3) Lift the front wheel, attach a marker pen with a rubber band so that it does not quite touch the disc (as close as you can get without it touching), spin the wheel, see if it marks, move it so it *just* touches, spin the wheel and see if you get an unmarked section. Not sure about VFR but bear in mind that the Suzuki SV OEM spec is 0.3mm and I've had brand discs with that, they show *no* signs of pulsing with 0.3mm, so I'd expect it to be noticable.
4) Had your tyres replaced since last MOT? Dropping a wheel with discs attached on the disc can bend them.
5) No, my VFR discs have 70+k on them.
Apart from that, some issues I have seen are part seized calipers push floating discs to one side, this wears the springs under the rivets and when one (eventually) breaks the disc is unbalanced and gives pulsing under light braking (but evens up under hard braking). Eventually this also wears the spider/centre (and to a partial extent the disc) allowing it to move front to back as well as side to side and then when all the springs go the discs *really* rattle and make a horrible sound at slow speed (plus push the pads back making braking for the first corner interesting).
Druid