APRILIA TUONO V4 R 2010 Service Station Manual page 278

Engine
•
Turn the crankshaft from the hole on
the clutch cover.
•
Move cylinder piston 1 (left rear piston)
to the TDC overlap;
•
Turn the crankshaft 150° in the engine
rotation direction (direction of travel), in
order to align the hole on the intake
camshaft with the specific hole on the
U bolt; this ensures that all the front
cylinder bank valve springs are decom-
pressed.
CAUTION
WHEN TURNING THE CRANKSHAFT, PREVIOUSLY RE-
MOVE ALL THE SPARK PLUGS.
•
Turn the crankshaft until the gear
screw covered by the head when the
hole on the camshaft gear is aligned
with the hole on the U bolt, is visible.
•
Block crankshaft rotation using one of
the specific tools.
•
Unscrew and remove the camshaft
gear screw.
•
Remove the crankshaft locking tool.
Specific tooling
020850Y Primary gear lock
020848Y Flywheel retainer
Repeat the following operations:
•
move cylinder piston 1 (left rear piston)
to TDC;
•
turn the crankshaft 150° in the engine
rotation direction (direction of travel), in
order to align the hole on the intake
camshaft with the specific hole on the
U bolt; this ensures that all the front
ENG - 278
TUONO V4 R