Suzuki GSX1300BK Owner's Manual page 147

To adjust the drive chain, follow the proce-
dure below:
 WARNING
A hot muffler can burn you. The muffler
will be hot enough to burn you for some
time after stopping the engine.
Wait until the muffler cools to avoid
burns.
1. Place the motorcycle on the side stand.
2. Loosen the axle nut 1.
3. Loosen the right and left lock nut 2.
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