APRILIA Tuono V4 1100 Factory Service Station Manual page 349

Tuono V4 1100 Factory
•
Fasten the camshaft horizontally, as
shown in the figure, and make it spin to
check the eccentricity with a dial
gauge; if necessary, replace the part.
Characteristic
Maximum camshaft axial clearance (intake/
outlet)
0.3-0.1 mm (0.012-0.004 in)
Check the timing chain for damage or stiffness
while moving.
If necessary, replace the timing chain together with
the camshaft gears.
Check the timing chain guide sliders for damage.
If necessary, replace the parts.
Installing camshafts
NOTE
THE INTAKE AND EXHAUST CAMSHAFTS ARE BOTH
DEDICATED FOR THE FRONT AND REAR CYLINDER
BANKS.
NOTE
THE INTAKE AND EXHAUST CAMSHAFTS OF THE FRONT
CYLINDER BANK ARE IDENTIFIED BY TWO LINES IN THE
POSITIONS INDICATED.
•
Refit the camshafts, ensuring that they
are aligned correctly.
If the two camshafts are timed correctly, the ex-
haust camshaft gear tooth (indicated with a dot) is
meshed with the trough of the intake camshaft
gear (indicated with two dots).
Engine
ENG - 349