APRILIA TUONO V4 R 2010 Service Station Manual page 76

Maintenance
•
Remove the intake and exhaust cam-
shafts.
If the two camshafts are timed correctly, the intake
camshaft gear tooth (indicated with one dot) is
meshed with the trough of the exhaust camshaft
gear (indicated with two dots).
•
Use a magnet to remove the tappet.
CAUTION
REMOVE THE TAPPET CAREFULLY AS THE PAD MAY FALL INTO THE ENGINE.
•
Retrieve the pad and replace with a
suitable component to achieve the cor-
rect valve clearance.
Refer to the table: "Calibrated pad thickness-
es" to identify the suitable thickness.
•
Fit the tappet.
See also
Calibrated pad thickness
NOTE
THIS ENGINE HAS CAMSHAFTS OF THE EXHAUST
VALVES WITH CLEARANCE RECOVERY.
•
Install the intake and exhaust camshafts on the rear head, remembering that:
the intake camshaft gear tooth (indicated with a dot) is inserted in the groove of the exhaust camshaft
gear (indicated with two dots).
CLEAN THOROUGHLY THE SEATS OF THE GEAR RETAINER SCREWS, ON THE INTAKE CAM-
SHAFT.
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TUONO V4 R