APRILIA SHIVER 900 Service Station Manual page 250

Engine
•
Align the play compensation gear-
wheel with the main distribution gear-
wheel using the dedicated tool.
Specific tooling
020718Y Camshaft gearwheel alignment pin
•
Position the cam tower.
•
Tighten the screws provisionally.
•
Time the camshafts, using the appro-
priate pins.
Specific tooling
020719Y Timing pin
•
Pre-tighten the nuts on the camshaft gearwheels.
FIT THE NUTS SO THAT THE MACHINED SURFACE IS FACING THE GEARWHEEL (MATERIAL
CODE VISIBLE).
•
Remove the cam tower and the cam-
shafts, place them in a vice using a pair
of aluminium jaws, then tighten the
nuts, applying the pre-defined torque.
NEVER APPLY THE DEFINITIVE TIGHTENING TORQUE TO
THE CAMSHAFT NUTS WHILE THE SHAFT IS MOUNTED
ON THE CYLINDER.
THIS WOULD DAMAGE THE HEAD IRREVERSIBLY.
ENG - 250
SHIVER 900