BMW AG Motorcycle (F 650 GS). Manual - part 29

33.12

•

Press in sealing rings (7) with drift, 
BMW No. 33 6 631, and spacing ring, 
BMW No. 33 6 632.

•

Press in sealing rings (6) with drift, 
BMW No. 33 6 611, and spacing ring, 
BMW No. 33 6 614.

•

Install bearing bushings (4, 11, 10).

F330170

6

5

4

11

10

9

7

8

33 6 631

33 6 632

F330250

33 6 611

33 6 614

F330260

34.1

Contents

Page

34

Technical Data

............................................................................................................................... 3

Removing and installing front brake calliper

 ................................................................5

Removing and installing front brake pads

 ...........................................................................5

See Group 00 ......................................................................................................................................5

Removing and installing front brake pistons

 .......................................................................6

Removing and installing front brake disc

 .......................................................................7

Checking brake disc for wear

 ....................................................................................................7

See Group 00 ......................................................................................................................................7

Checking front brake disc for lateral runout 

.................................................................7

Removing and installing rear brake calliper

 ..................................................................8

Removing and installing rear brake pads

 .............................................................................8

See Group 00 ......................................................................................................................................8

Removing and installing rear brake piston

 ..........................................................................9

Removing and installing rear brake disc

 .......................................................................10

Checking brake disc for wear

 ..................................................................................................10

See Group 00 ....................................................................................................................................10

Checking rear brake disc for lateral runout

 .................................................................10

Replacing primary sealing boot front brake master cylinder 

............................10

See Group 00 ....................................................................................................................................10

Removing and installing front brake master cylinder 

............................................11

Removing and installing handbrake lever

 .....................................................................11

See Group 32 ....................................................................................................................................11

Replacing primary sealing boot, rear brake master cylinder 

.............................11

See Group 00 ....................................................................................................................................11

Removing and installing rear brake master cylinder

 ..............................................11

Removing and installing footbrake lever

 .......................................................................12

34 Brakes

34.2

Contents

Page

Checking play at piston thrust rod, adjusting if necessary

 ........................................12

Checking play at piston thrust rod .....................................................................................................12
Adjusting play at piston thrust rod  .....................................................................................................13

Removing and installing front ABS sensor

 ...................................................................13

Removing front ABS sensor ring

 ........................................................................................14

Removing and installing rear ABS sensor 

....................................................................14

Removing and installing rear ABS sensor ring

 ..........................................................15

Removing and installing ABS control unit

 ....................................................................15

Removing and installing front brake lines/hoses (with ABS) 

.............................16

Removing and installing brake lines

 .....................................................................................16

Removing and installing front brake hoses

 .......................................................................17

Removing and installing rear brake lines/hoses (with ABS) 

...............................17

Removing and installing brake lines

 .....................................................................................17

Removing and installing brake hose

 ....................................................................................18

Checking/adjusting front ABS sensor gap

 ...................................................................19

Adjusting ABS sensor gap  ................................................................................................................19

Checking/adjusting rear speed/ABS sensor gap

 .....................................................19

Adjusting ABS sensor gap  ................................................................................................................19

34.3

34

Technical Data

F 650 GS

Brakes

Brake fluid

DOT 4

Brake actuation

Hydraulic

Front wheel

Front brake

2-piston floating calliper with rigidly mounted disc

Brake disc dia.

mm (in) 300 (11.81)

Brake-disc thickness
Minimum thickness

mm (in)
mm (in)

5 (0.20)
4.5 (0.18)

Permissible lateral runout

mm (in) 0.25 (0.010)

Brake pads

Sintered

Brake pad surface area

cm

2

(sq in) 46 (7.1)

Minimum lining thickness

mm (in) 1 (0.04)

Piston dia. in brake calliper

mm (in) 30/32 (1.18/1.26)

Piston diameter in handlebar lever cylinder

mm (in) 13 (0.51)

Rear wheel

Rear brake

1-piston floating calliper with rigidly mounted disc

Brake disc dia.

mm (in) 240 (9.45)

Brake-disc thickness
Minimum thickness

mm (in)
mm (in)

5 (0.20)
4.5 (0.18)

Permissible lateral runout

mm (in) 0.25 (0.010)

Brake pad surface area

cm

2

(sq in) 29 (4.5)

Minimum lining thickness

mm (in) 1 (0.04)

Piston dia. in brake calliper

mm (in) 34 (1.34)

Piston dia. in foot brake cylinder

mm (in) 11 (0.43)

Brake pads

Organic

34.4

34.5

34 11 021 

Removing and installing 

front brake calliper

e

 Caution:

Refer to notes on the hazards involved in handling 
brake fluid.

•

Press the brake calliper against the brake disc in 
order to force the pistons back.

•

Release brake line (3) at brake calliper and seal 
the line.

•

Loosen retaining screws (4) for brake support 
bracket.

•

Carefully pull brake carrier (1) with brake 
calliper (2) off the brake disc.

e

 Caution:

Do not damage brake pads.

•

Installation is the reverse of the removal proce-
dure.

L

 Note:

Remove sealing rings for brake line.

e

 Caution:

Top up brake fluid and bleed brake system.
Operate brake several times until brake pads are 
correctly seated.

X 

Tightening torque:

Brake calliper to fork slider tube ..................  41 Nm
Brake line to brake calliper ........................... 18 Nm

34 11 008 

Removing and installing front 

brake pads

See Group 00

E340050

3

1

2

4

34.6

34 11 521 

Removing and installing front 

brake pistons

–

Remove front brake calliper.

•

Remove the split-pin keeper (1) from retaining 
pin (2).

•

Drive the retaining pin out towards the wheel 
side.

•

Pull the brake pads (6) down to remove.

•

Hold a cloth over the brake calliper.

e

 Caution:

Do not insert your fingers between the pistons; risk 
of injury.

•

Carefully press out brake pistons (5), using a 
compressed air gun at the brake line connection.

•

Remove the two sealing rings (3, 4) from the left 
and right brake piston bores.

•

Examine the brake calliper pistons for damage.

•

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

•

Coat new sealing rings (3, 4) with brake fluid and 
install.

•

Coat the brake pistons (5) with the assembly fluid 
supplied and install.

e

 Caution:

Keep the brake pistons parallel with their bores 
when installing.

•

Using piston compressor, BMW No. 34 1 500, if 
necessary press the pistons fully back.

•

Install the brake pads.

E340060

2

1

6

5

3

4

34.7

34 11 809 

Removing and installing 

front brake disc

e

 Caution:

Do not operate the brake with the wheel removed.

–

Remove front wheel.

a

....................................................See Group 36

L

 Note:

Retaining screws (1) are secured with Loctite 243 
and should be heated if necessary before removal.

•

Remove retaining screws (1) with brake disc.

•

[ABS] Remove sensor ring (2).

•

Remove brake disc.

e

 Caution:

The inscription on the brake disc must face towards 
the outside.

•

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

•

Clean the threads of the securing screws and 
wheel hub, coat threads with Loctite 243 and in-
stall the screws.

•

Check the ABS sensor gap and adjust if neces-
sary.

a

....................................................See Group 34

X 

Tightening torque:

Brake disc to front-wheel hub
(clean thread + Loctite 243)............................ 9 Nm

Checking brake disc for wear

See Group 00

Checking front brake disc for lateral 
runout

e

 Caution:

Do not operate the brake with the wheel removed.

–

Remove front wheel.

a

....................................................See Group 36

•

Mount front wheel on balancing stand, 
BMW No. 36 3 617, with balancing shaft, 
BMW No. 36 3 600.

•

Using dial gauge, BMW No. 00 2 510, measure 
lateral runout.

Lateral runout “A” .............. max. 0.25 mm (0.010 in)

E340070

1

2

A

F340050

00 2 510