Desmodromic (type) with four valves per cylinder, operated by eight rocker arms (4 opening rockers and 4 closing rockers) and two overhead camshafts. It is operated by the crankshaft through spur gears, belt rollers and toothed belts.
Desmodromic timing system (fig. 159)

Engine
Performance dataWarranty
In your own interest, and in order to guarantee product
reliability, you are strongly advised to refer to a ducati dealer
or authorised service centre for servicing that requires any
particular technical expertise.
Our highly skilled staff have the tools required to perform any
servicing job ...
Refitting the rear mudguard
Place the rear mudguard (8) on the swingarm, fitting the screws (9) with
recommended threadlocker.
The screw (9) in the bottom hole of the rear mudguard (8) must be installed with
the washer (r).
Tighten the screws (9) to a torque of 5 nm +/- 10% (sect. 3 - 3, Frame torque
settings).
...
Dashes shown instead of speed indication or indicated speed is incorrect
Fault codes
Dds: speed sensor diagnosis -> max. Speed (max. Speed error - signal not
correct) - minimum speed (min speed error -
signal not correct) - congruence (correlation speed error - signal not correct).
Dashboard: the error "speed sensor" is shown on the service display. The eobd
...