BMW F 800 GS Rider's Manual page 119

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 ( 116).
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 the chain wear
Make sure the ground is level
and firm and place the motor-
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.
Permissible chain length
max 144.30 mm (measured
centre to centre over 10
pins, chain pulled taut)
If the chain has stretched to the
maximum permissible length:
Seek the advice of a specialist
workshop, preferably an author-
ised BMW Motorrad dealer.
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