claudea
Junior Member
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- Feb 26, 2009
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- Location
- Perth, Western Australia
Hi,
I have a 1992 FZR 600 - Genesis and it has developed a pulsing rear disc brake.
This is enough to cause the rear wheel to lock under braking.
I have had the disc skimmed and they said very little had been rmoved and it’s not warped.
The bike has only done about 30,000 km's and this problem appeared suddenly.
I have tried the following:
With the bike off the ground, spinning the wheel with the pads in place is enough to notice them contacting just one spot.
Have removed the disk,
. Checked the 6 mounting points for the disk and they’re all clean
. Lightly sanded this area on the back of the disk with 1000 wet and dry.
. Cleaned the threads with a tap and they’re good.
After cleaning all the bolts I have used Loctite (blue) on the bolts each time the disk was remounted and the wheel checked on the bike.
Steps taken so far with the bike on a stand and the pads removed:
. With a dial gauge on the disc there is a high spot/ run-out of .012mm
. Rotated disk and the spot is always on the same position on the wheel.
. Tried another disc on my wheel and the high-spot / run-out was 0.006, same position on the wheel.
. Tried another wheel
- with my disc and same result
- with another disk same result.
Axel is straight.
All wheel bearings have replaced, but no change.
I have also checked it without fully tightening the axel but there is no change.
Next step today is to retry and get an accurate measurement on the wheel itself and check the vsariance.
I have run out of ideas on what could be wrong and how to correct the problem.
One suggeestion is sanding down the disc mounting points ton the wheet o remove the high spot - but I'm not very keen on this.
Any thoughts or suggestions.
I have a 1992 FZR 600 - Genesis and it has developed a pulsing rear disc brake.
This is enough to cause the rear wheel to lock under braking.
I have had the disc skimmed and they said very little had been rmoved and it’s not warped.
The bike has only done about 30,000 km's and this problem appeared suddenly.
I have tried the following:
With the bike off the ground, spinning the wheel with the pads in place is enough to notice them contacting just one spot.
Have removed the disk,
. Checked the 6 mounting points for the disk and they’re all clean
. Lightly sanded this area on the back of the disk with 1000 wet and dry.
. Cleaned the threads with a tap and they’re good.
After cleaning all the bolts I have used Loctite (blue) on the bolts each time the disk was remounted and the wheel checked on the bike.
Steps taken so far with the bike on a stand and the pads removed:
. With a dial gauge on the disc there is a high spot/ run-out of .012mm
. Rotated disk and the spot is always on the same position on the wheel.
. Tried another disc on my wheel and the high-spot / run-out was 0.006, same position on the wheel.
. Tried another wheel
- with my disc and same result
- with another disk same result.
Axel is straight.
All wheel bearings have replaced, but no change.
I have also checked it without fully tightening the axel but there is no change.
Next step today is to retry and get an accurate measurement on the wheel itself and check the vsariance.
I have run out of ideas on what could be wrong and how to correct the problem.
One suggeestion is sanding down the disc mounting points ton the wheet o remove the high spot - but I'm not very keen on this.
Any thoughts or suggestions.