BMW F 650 GS Repair Manual page 194

Removing chainwheel
27 71 000
– Remove rear wheel (
a
1
3
•
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
Removing chain sprocket
27 71 000
– Remove chain ( 27.5).
a
– Select first gear.
•
Straighten the tabs of the locking washer on the
central nut.
•
Open the plug on the right side of the crankcase.
•
Hold crankshaft with Allen key (arrow).
27.6
36.7).
2
E360030
E270040
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
sprocket 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 sprocket.
– 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
4
5
E270030