BMW F 800 GS Adventure Rider's Manual page 91

If measured value is outside per-
mitted tolerance:
Adjust chain sag (
Adjust chain sag
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
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.
Check chain sag (
Make sure that scale read-
ings 4 are the same on left and
right.
89).
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 the chain wear
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Engage 1st gear.
88).
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.
Permissible chain length
max 144.30 mm (measured
centre to centre over 10
pins, chain pulled taut)
8
89
z