Rear Cylinder Head Valves - APRILIA RSV4 R Service Station Manual

Maintenance
•
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
•
Check if the clearance between the cam on the shaft and the tappet is correct.
•
If not, repeat the valve clearance adjustment procedure.

Rear cylinder head valves

•
Check the rear valve head clearance and restore the correct clearance values if necessary,
proceeding as described below.
•
Remove the rear head cover and the clutch cover.
•
Move cylinder piston 1 (left rear piston) to the TDC;
MAIN - 74
RSV4 R