Timing System - Ducati MONSTER 821 Owner's Manual

Timing system

DESMODROMIC system with four valves per
cylinder controlled by eight rocker arms (four opening
and four closing ones) and two overhead camshafts.
This system is driven by the crankshaft through spur
gears, pulleys and toothed belts.
Desmodromic timing system
1) Opening (or upper) rocker arm;
2) Upper rocker arm shim;
3) Closing (or lower) rocker arm shim;
4) Return spring for lower rocker arm;
5) Closing (or lower) rocker arm;
6) Camshaft;
7) Valve.
278
6
2
1
2 5
2 1
3
5
4
7
Fig. 213