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 dataReassembly of structural components and the frame
Check for the nuts with clips (8).
Apply recommended grease on the threads of the adjusters (4) and the ring
nuts (5) having care not to have grease on
the surface (c) of the adjusters.
Tighten the adjusters on the ring nut side opposite to that featuring flats
until bringing the surfac ...
Refitting the cooling system hoses and unions
Position the pump/radiator sleeve (22) and the radiator/radiator sleeve (23).
Fit sleeve (23) and sleeve (22) to their corresponding fittings (n) and (o), and
bring them fully home on collars (p).
Note
Sleeves (23) and (22) must be oriented so that the grooves (q) match the
tabs (r) on fitt ...
Rear shock absorber assembly
Special screw
Screw
Nut
Grub screw
Bush (right)
Bush (left)
Screw
Sealing ring
Roller bearing
Linkage (left)
Shock absorber (rear)
Linkage (right)
Spacer
Special screw
Screw
Bush
Ball joint
Rocker arm assembly
Support
Washer
Nut
Screw
Shock absorber ...