Ducati Monster 796 Workshop Manual page 560

Cylinder head assemblies: valves - rocker arms
Repeat the procedure for the exhaust side.
Attach the end of the spring (9) of the closing rocker arm (18) to the tool 88713.2783.
Slide out the closing rocker arm shaft (4) using tool 88713.2837.
Remove the rocker arm (18), the spring (9) and the service tool 88713.2783.