BMW AG Motorcycle (F 650 GS). Manual - part 25

27.4

27.5

27 71 000 

Removing and installing 

chain, chainwheel and chain 
sprocket

e

 Caution:

Always replace the chain, chainwheel and chain 
sprocket as a set.

27 72 001 

Removing and installing chain

•

Remove the sprocket cover.

–

Remove rear swinging arm.

a

....................................................See Group 33

•

Lift chain off chain sprocket and remove by pull-
ing towards the rear.

•

Inspect chain takeup roller (1) and slide rail (3) for 
wear and replace if necessary.

•

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

•

Adjust chain tension before tightening the nut on 
the quick-release axle.

X 

Tightening torques:

Swinging arm pivot shaft ............................ 100 Nm
Strut to swinging arm ................................... 41 Nm
Rear quick-release axle.............................. 100 Nm
Chain tensioning screws .............................. 10 Nm
Wheel cover bracket to swinging arm............. 9 Nm

27 72 009 Removing and installing chain guide 
rail

•

Release fasteners (2) at top and bottom and re-
move guide rail (3).

•

Installation is in the reverse of the removal proce-
dure.

Removing and installing chain takeup roller

L

 Note:

The chain takeup roller can be removed and in-
stalled without removing the chain and the rear 
wheel.

•

Remove nut (4) with a/f 6 Allen key.

•

Remove chain takeup roller (1) together with the 
fastener.

•

Installation is the reverse of the removal proce-
dure.

X 

Tightening torques:

Chain takeup roller to frame ......................... 21 Nm

E270020

1

3

2

4

27.6

27 71 000 

Removing chainwheel

–

Remove rear wheel.

a

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

•

Remove chainwheel carrier (2) together with 
chainwheel (1) from rear wheel hub.

•

Remove screws (3) and remove the chainwheel.

X 

Tightening torques:

Chainwheel to carrier ................................... 21 Nm

27 71 000 

Removing chain sprocket

–

Remove the chain.

–

Select first gear.

•

Straighten the tabs of the locking washer on the 
central nut.

•

Remove the plug on the right side of the crank-
case.

•

Hold crankshaft with Allen key (arrow).

d

 

Warning:

Central nut (5) is secured with Loctite 243 and con-
siderable torque is required to release it.

•

Unscrew central nut (5).

•

Remove the locking washer (4).

•

Use puller, BMW No. 00 8 400, to pull the chain-
wheel off the mainshaft.

•

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

•

Lightly coat the mainshaft with Optimoly MP 3 
before installing the chainwheel.

–

The sprocket must be installed with the “EXT” 
marking on the outside.

•

Install a new locking washer (4).

•

Clean threads of central nut and mainshaft, coat 
threads with Loctite 243 and install nut.

•

Bend up tab (arrow) of locking washer.

X 

Tightening torques:

Central nut on mainshaft
(clean thread + Loctite 243)........................ 140 Nm

E360030

2

1

3

E270040

EX

T

E270030

5

4

27.7

27 72 009 

Removing and installing chain 

guide rail with swinging arm installed

•

Remove the sprocket cover.

•

Remove the rear quick-release axle.

•

Remove the chain from the chainwheel and 
chain sprocket.

•

Remove the fasteners securing the chain guide 
rail to the swinging arm.

•

Pull out the guide rail between the sprocket and 
the main frame.

•

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

•

Do not damage the guide rail when installing; 
mask with tape if necessary.

X 

Tightening torques:

Rear quick-release axle.............................. 100 Nm
Chain tensioning screws .............................. 10 Nm

27 71 005 

Adjusting chain tension

See Group 00

27.8

32.1

Contents

Page

32

Technical Data

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

Removing and installing left and right handlebar fittings 

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

Removing and installing left handlebar fitting

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

Removing and installing clutch switch

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

Removing and installing right handlebar fitting

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

Removing and installing handlebar 

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

Removing and installing clutch cable 

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

Removing and installing throttle cable 

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

Checking and adjusting steering head bearing play, 
renewing if necessary 

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

(Inspections II and III) .........................................................................................................................13

Checking steering head bearing play

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

Checking and adjusting steering head bearing play, 
renewing if necessary 

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

(Inspections II and III) .........................................................................................................................13

Adjusting steering head bearing play

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

Removing and installing left and right handlebar levers 

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

Removing and installing left handlebar lever

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

Removing and installing right handlebar lever

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

32 Steering

32.2

32.3

32

Technical Data

F 650 GS

Steering

Type

One-part tubular handlebar with cross-tie

Steering lock angle

° 40

Steering tube diameter

mm (in) 22 (0.87)

Width across handlebars (handlebar only, 
without grips)

mm (in) 770 (30.3)