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 dataRemoval of the front brake master cylinder
Warning
The brake master cylinder manufacturer advises against servicing the
brake master cylinder due to the safety critical
nature of this component. Incorrect overhaul of these critical safety components
can endanger rider and passenger safety.
Maintenance operations on these units are l ...
Reassembly of the timing pulleys
Fit the pulley (11) on the flange (24), aligning the timing mark (d) on the
pulley with the timing mark on the (e) on the
flange.
Install the washer (23) up against the pulley, aligning the timing notch (f)
with the timing marks on the pulley and the
flange.
Insert the three screws (22) ...
Removal of the tail light
Disconnect the connectors (a) and (b) of the tail lights (1) and (13).
Loosen the screws (4) and slide the tail lights (1) and (13) to the rear side;
recover the four spacers (3) and the washers
(14).
...