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 dataWiring diagram colour codes
B blue
Bk black
Bn brown
G green
Gr grey
Lb light blue
O orange
P pink
R red
V violet
W white
Y yellow
Rear left fuse box (1) key
Rear right fuse box (2) key
...
Lubricating cables and joints
Check the outer sheath of the throttle control and cold start
lever cables for damage at regular intervals. The outer plastic
cover should not be flattened or cracked. Operate the
controls to make sure the inner cables slide smoothly inside
the outer sheath: if you feel any friction or catching, ...
Disassembly of the rear brake control
The brake master cylinder is supplied only as a complete unit; internal
components cannot be replaced.
To disassemble the master cylinder's outer parts, follow the indications given
in the exploded view at the beginning of this
section.
If the bush (10) inside the brake pedal (6) needs to ...