R1100S front brake problem

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VINCOM500
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Location: New Forest

R1100S front brake problem

Postby VINCOM500 » Fri Jul 07, 2017 8:26 am

I was returning from a track day where the brake got a lot harder use than normal , when I came up to some lights in town , I squeezed the brake and it felt like a pop and suddenly I didnt have any brake at all, I managed to stop ok and had a good look for fluid loss , couldn't see any . After pumping the lever with not much idea I got pressure again and the brake worked ok the rest of the way home .
Just lucky it didn't happen on track !
Any ideas ?.

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The Teutonic Tangerine
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Re: R1100S front brake problem

Postby The Teutonic Tangerine » Fri Jul 07, 2017 8:33 am

I think I would at least be renewing the master Cylinder seals and the fluid - you may have cooked the fluid on track or it may be "water logged" if its not been changed for a while.
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milleplod
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Re: R1100S front brake problem

Postby milleplod » Fri Jul 07, 2017 8:35 am

Old fluid, perhaps some moisture in it...hard use gets everything super hot, moisture boils off....air in system? :? Just a thought!

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Crazy Kev
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Re: R1100S front brake problem

Postby Crazy Kev » Fri Jul 07, 2017 7:35 pm

Blead brakes?!
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VINCOM500
Posts: 8
Joined: Sat Feb 19, 2011 10:09 am
Location: New Forest

Re: R1100S front brake problem

Postby VINCOM500 » Sat Jul 08, 2017 9:05 am

Thanks guys, for replies .
Weird I've got full , solid front brake again ! without doing anything .
Cheers Gary.

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slparry
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Re: R1100S front brake problem

Postby slparry » Sun Jul 09, 2017 8:57 am

which backs up what everyone advised, it's now cooled down.

There's good reason BMW recommend changing brake fluid regularly, which many fail to do, then find failed abs pumps as the moisture causes problems, or internal corrosion and overheat issues
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Current fleet: '14 F800GS, '87 R80RS, '03 R1100S BoxerCup, '15 R1200RT LE Dynamic, '90 K1


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