Ducati 998 2001 Manuel D'utilisation Et Entretien page 118

Chain tension inspection (fig. 34)
With the motorcycle on the side stand, the chain must
have a min. distance of 25 mm from the swingarm.
If this is not the case, contact a Ducati Dealer or
Authorized Workshop for proper chain tensioning.
Warning
Correct tightening of the eccentric hub clamping
screws is essential to rider and pillion passenger's safety.
E
Important
Improper chain tension will lead to early wear of
transmission parts.
Tensione catena (sul cavalletto laterale)
Chain tension adjustment (on side stand)
46
Chain lubrication
The chain fitted on your motorcycle has O-rings that keep
dirt out of and lubricant inside the sliding parts. The seals
might be irreparably damaged if the chain is cleaned
using any solvent other than those specific for OR chains
or washed using steam or water jets. After cleaning,
blow the chain dry or dry it using absorbent material and
apply SHELL Advance Chain or Advance Teflon Chain on
each link.
Important
Using non-specific lubricants may lead to severe
damage to chain, front and rear sprocket.
fig. 34