APRILIA SCARABEO 500 2008 Service Station Manual page 168

Engine
Removing the timing system drive
- Turn the engine until the intake valves are closed.
- Remove the central screw and the valve-lifter
mass retaining cover using the specific tool.
Specific tooling
AP8106702 Flywheel lock calliper spanner
- Remove the return spring and the valve-lifter
mass with relevant end of stroke washer.
NOTE
BE CAREFUL SO THAT THE SPRING AND THE
WASHER DO NOT FALL INTO THE ENGINE
THROUGH THE CHAIN COMPARTMENT.
- Align the reference marks located on the timing
chain gear and on the head.
ENG - 168
SCARABEO 500