Motorcycle BMW R1150RT. Manual - part 67

34.13

Checking and adjusting blow-by clear-
ance of piston rod

Checking blow-by clearance of piston rod

•

Press the footbrake lever.

•

Insert feeler gauge at right angles to direction of 
travel between the brake-light switch lever (3) 
and the stop on the footrest plate (arrow).

•

Slowly release the footbrake lever and check 
play.

Play must be perceptible
Feeler gauge thickness: ........ 0.15 mm (0.0059 in)

No play perceptible
Feeler gauge thickness: ........ 0.35 mm (0.0137 in)

Adjusting blow-by clearance at piston rod

•

Set the adjusting screw of the footbrake lever to 
distance A.

Distance A: . 13.6 +/- 0.5 mm (0.5354+/-0.1969 in)
(Top edge of footbrake lever to top edge of adjusting 
screw.)

•

Insert feeler gauge at right angles to direction of 
travel between the brake-light switch lever and 
the stop on the footrest plate (arrow).

Feeler gauge thickness:.......... 0.2 mm (0.0078 in)

•

Slacken locknut (1).

•

Turn piston rod (2) clockwise toward the foot-
brake lever to obtain play.

•

Carefully back off piston rod to take up play and 
tighten locknut.

•

Remove the feeler gauge.

•

Recheck play.

•

Apply coloured sealing lacquer to the locknut.

R22340020

3

R22340010

A

1

2

34.14

Checking and adjusting setting of rear 
brake light switch

Checking setting of brake light switch, rear 

•

Switch on the ignition.

L

 Note:

After switching on the ignition, always wait for the 
BMW Integral ABS to complete its self-diagnosis.
Do not operate the brake lever until self-diagnosis 
has completed.

•

Depress the footbrake lever (brake light comes 
on and pump starts up).

•

Insert feeler gauge at right angles to direction of 
travel between the brake-light switch lever (3) 
and the stop on the footrest plate (arrow).

•

Slowly release the footbrake lever and check the 
point at which the switch trips.

Brake light switch must switch off
Feeler gauge thickness: ........ 0.90 mm (0.0354 in)

Brake light switch must remain on
Feeler gauge thickness: ........ 1.60 mm (0.0629 in)

•

Switch off the ignition.

Adjusting brake light switch, rear 

•

Depress the footbrake lever and secure it in this 
position.

•

Slacken screw (4).

•

Turn the brake light switch until the switch trips 
at distance (B).

•

Hold the brake light switch and tighten the 
screw.

•

Recheck the setting.

Distance B:.......... 1 + 0.5 mm (0.0393 + 0.1968 in)
(clearance at switching point between brake-light 
switch lever and footrest plate).

Removing and installing piston in 
brake-lever fitting 

a

See the section on the steering system 
(

a

32.11).

R22340020

B

3

R22340030

4

R22340020

B

34.15

34 00 

Removing and installing Inte-

gral ABS pressure modulator

d

 Warning:

All repair and maintenance work on the 
BMW Integral ABS must be performed by trained, 
qualified specialists.
Comply with all maintenance and repair instructions 
and always work through the various steps in the 
correct order.
Use only new brake fluid from freshly opened con-
tainers.

Removing Integral ABS pressure mod-
ulator

e

 Attention:

Do not allow brake fluid to come into contact with 
painted parts of the motorcycle as brake fluid de-
stroys paint.

•

Drain the brake system (

a

34.17).

•

Disconnect ground lead from battery and insu-
late.

•

Push protective caps (1) up.

•

Remove spring clips (2).

R28340060

2

1

4

3

34.16

e

 Attention:

Do not bend the brake lines.

•

Disconnect the brake lines from the ABS pres-
sure modulator.

e

 Attention:

Do not permit brake fluid to enter the plugs.

•

Disconnect plugs (3) of the front and rear wheel 
circuit reservoirs.

•

Unlock plug (4) (arrow) and disconnect the plug.

•

Disconnect plug from Hall transmitter.

•

Remove Motronic control unit.

•

Release ABS pressure modulator and pull it 
carefully to the left to remove.

Installing Integral ABS pressure modu-
lator

•

Installation is the reverse of the removal proce-
dure: pay particular attention to the following.

L

 Note:

Always replace the seals (square-section rings) be-
tween the brake lines and the pressure modulator 
when you replace the brake lines.

d

 Warning:

Always fit new spring clips each time the plugs are 
disconnected. Ensure correct positioning.

•

Install new spring clips.

•

Slip the protective caps up the brake lines.

•

Clip in brake lines.

•

Check that spring clips are correctly positioned 
(arrows).

•

Seat the protective caps on the connectors.

•

Connect the battery.

•

Fill and bleed the brake system (

a

34.20).

•

After all the work on the brake system has been 
completed, run a bleed test using the 
BMW MoDiTeC (

a

34.30).

L

 Note:

Disconnecting the battery means that the entries in 
the fault memory of the Motronic MA2.4 control unit 
are deleted and the adaptation values are reset.
This can temporarily impair the operating character-
istics when the engine is restarted.

•

Switch on the ignition.

•

Without starting the engine, fully open the throttle 
once or twice so that the Motronic control unit 
can register the throttle-valve positions.

X 

Tightening torque:

ABS pressure modulator to battery carrier ... 10 Nm
ABS pressure modulator to holder ................. 7 Nm