APRILIA TUONO V4 R a-PRC ABS Service Station Manual page 313

TUONO V4 R a-PRC ABS
•
Remove the two crankshaft and cam-
shaft reference pins.
•
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.
•
Apply Loctite 243 thread lock on the
thread of the second gear fastener
screw. This screw must be replaced at
each reassembly.
•
Tighten the second camshaft gear fix-
ing screw to exactly the torque speci-
fied.
•
Remove the crankshaft locking tool.
Specific tooling
020848Y Flywheel retainer
020850Y Primary gear lock
020851Y Camshaft timing pin
020852Y Crankshaft timing pin
•
Turn the crankshaft back to the previous position in which the camshaft and U bolt holes
were aligned; insert the reference pin while checking with the crankshaft reference pin, that
the flywheel side hole and the hole on the crankshaft are perfectly aligned.
•
If this is not the case, repeat the timing operations.
Specific tooling
020851Y Camshaft timing pin
020852Y Crankshaft timing pin
Rear head
Removing camshafts
•
Remove the rear head cover and the clutch cover.
•
Move cylinder piston 1 (left rear piston) to the TDC;
•
Turn the crankshaft 450° (one complete turn + 90°) in the direction of motor rotation (direction
of travel).
Engine
ENG - 313