APRILIA TUONO V4 R a-PRC ABS User Manual

•
Install the specific camshaft gear sup-
port tool.
•
Fix it to the head using the two screws
(1).
•
Move the gear from the camshaft to the
tool.
Specific tooling
020956Y Support for camshaft gear on head
•
Unscrew and remove the eight screws
(2), proceeding in stages and diago-
nally.
•
Retrieve the washers from the screws
near the spark plug holes.
•
Remove the U bolts with the O rings
and locator pins.
•
Remove the intake and exhaust camshafts.
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).
Inspecting camshafts
CAMSHAFT TOOTHED WHEEL CHECK
•
Check that the camshaft gear works properly: if it is damaged or does not move smoothly,
replace the timing chain and the camshaft gear.
CAMSHAFT LOBES
•
Check that they do not show blue colouring, cracks or scratches; otherwise, replace the
camshaft, gear and chain.
Engine TUONO V4 R a-PRC ABS
ENG - 316

APRILIA TUONO V4 R a-PRC ABS Specifications

General

Brand	APRILIA
Model	TUONO V4 R a-PRC ABS
Category	Motorcycle
Language	English