Ducati Monster 796 Workshop Manual page 371

Fork - steering head: front fork
Inspection of the front fork left leg
Place the spring on a flat surface and measure the free length (L).
Service limit:
- 270 mm.
Renew the spring if the length is not within the specified limit.
Inspect the outer surfaces of both fork inner tubes and the internal surfaces of both outer tubes. They must be free from
scoring, steps, or dents.
Check that the outer tubes are straight:
- maximum allowed error 0.10 mm.
Whenever the inner tube is removed from the outer tube it is good practice to renew the bushes (G) and (H).
Reassembly of the front fork left leg
Locate the outer tube (18) on the inner tube (19).
Before reassembly, remove any oil from the spring (14).