BMW F 800 GS 2012 Rider's Manual page 104

8
Chain deflection
102
35...45 mm (Motorcycle with
no weight applied, supported
on its side stand)
If measured value is outside per-
mitted tolerance:
Adjust the chain sag (
Adjusting chain sag
Make sure the ground is level
and firm and place the motor-
z
cycle on its stand.
102).
Slacken quick-release axle
nut 1.
Slacken locknuts 2 on left and
right.
Use adjusting screws 3 on left
and right to adjust chain sag.
Checking chain sag (
Make sure that scale read-
ings 4 are the same on left and
right.
Tighten locknuts 2 on left and
right to the specified tightening
torque.
Locknut of the final-drive
chain tensioning screw
19 Nm
Tighten quick-release axle
nut 1 to the specified tight-
ening torque.
Rear quick-release axle
in swinging arm
100 Nm
Checking chain wear
Make sure the ground is level
and firm and place the motor-
101).
cycle on its stand.
Engage 1st gear.
Turn the rear wheel in the nor-
mal direction of travel until the
chain is tensioned.
Measure the length of the
chain over 9 rivets below the
rear wheel swinging arm.