BMW R1100 Spezifikationen PDF herunterladen (Seite 26)

Spongy Brakes Fix – Simon Evans

Fiddling with the R1100GS this morning, I removed the handguards for cleaning and to top up

the brake master cylinder (the spate of warm weather in the UK having caused a re-ocurrence

of that perennial old bugbear - the “Spongy brake – or the ohmigodthelevercumsbacktothebar

syndrome”).

Accidentally, I knocked off the lower plastic cover under the brake lever housing and hey!,

what's this - a large screw that appears to wind into the master cylinder or the piston...

DING! [the sound of the penny dropping]...

I twiddled it in half a turn and, presto!, no more spongy brakes..!!!!! This ranks on a par with

the discovery of gold in the Yukon, or oil in the North Sea... Brembo, I love you again..<HBG>

I've checked with my dealer and the screw is used to dial out the individual tolerances of each

brake system at the factory, and works on the piston itself. Ducati Brembos have a similar

setup, but with a knurled nut.

Caution says wInding it in too far could cause a lock-up as there must be a certain amount of

`give` in the system to allow the piston to clear the master cylinder hole on brake release. Half

a turn maximum should be fine, and even a quarter makes a B-I-G difference... just make sure

the wheel still rotates freely after brake application and release, and you should be OK..

So here’s the quick step by step 30 second fix:

1. Remove cover from front of brake lever assembly (one screw facing forwards

at bottom of switchgear cluster).

2. Behind cover find one large grub screw with red paint dot.

3. Turn grub screw one-quarter to one-half turn clockwise only!!!

Make absolutely sure that there is still some freeplay in the system or else you risk

brake lockup in use!!! Try spinning the front wheel as you pull the lever and “dial in”

the amount of freeplay you require.

4. PRESTO! No more spongy brakes.

(Note: This is NOT a fix for AIR in your brake lines!)

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BMW R1100 Spezifikationen Seite 26