Ducati MONSTER 1200 Owner's Manual page 304

Attention
Correct tightening of swinging arm screw (1) is
critical to rider and passenger safety.
Important
Improper chain tension will lead to early wear of
transmission parts.
Important
To ensure the best performance and long life of
the chain, please follow the information related to
chain cleaning, lubrication, inspection and
tensioning.
1
Fig 219
303