Front brake lever not returning fully

Blood1 · Jul 1, 2019

Front brake lever not returning fully:

I have a R1200RTP 2008. The front brake lever fails to return fully after use. I have to push it back using my fingers I think that if you don't push it back it will warp the discs. However I dont know the cause as pistons are free. I've undone the disc screws/boltsn them wriggled the discs to make sure are free then secured everything. My brake works but feels soft and lever still wont return fully.

Any advice please

thomo57 · Jul 2, 2019

Have you tried bleeding it?
soft, spongy brake is usually air in the brake fluid..
Good luck

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Packer · Jul 2, 2019

Eleven year old bike, when was the fluid last changed. May be time for a master cylinder repair kit and a good clean out.

Have the same problem with my '83 R100. Kit on the bench, just need some time.

bandytales · Jul 2, 2019

1/. Contamination in the piston (normally a crystaline goop).
2/. Blocked by-pass hole
3/. Damaged O ring on piston shaft (often gets damaged during a brake fluid change when the piston travels further than normal).
4/. Dirt.

chopper_harris · Jul 9, 2019

A 2008 bike should have iABS2, non-servo with the pump assisted ABS.

To fully purge the ABS unit, you should used a GS911 or the dealer service tool to cycle the abs unit.

Blood1 · Jul 27, 2019

Cured the brake lever issue

Hi all
Removed master cylinder removed lever pivot bolt. Cleaned pivot with wet n dry lubed and reassembled perfect now.. nothing to do with hydraulics.

Front brake lever not returning fully

Blood1

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thomo57

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Packer

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bandytales

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chopper_harris

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Blood1

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