APRILIA TUONO V4 R 2010 Service Station Manual page 386

Suspensions
•
Using an Allen spanner on the related
seat (1), lock the rotation of the threa-
ded pin (2), unscrew and remove the
self-locking nut (3) and the threaded
pin (2).
THE SELF-LOCKING NUTS (3) MUST BE REPLACED EV-
ERY THREE SPROCKET REMOVALS.
REPLACE THE SELF-LOCKING NUTS (3) WITH NUTS OF
THE SAME TYPE.
•
Remove the sprocket mounting (4).
•
Clean the sprocket (5) and the sprock-
et mounting (4) with fresh detergent.
Reassembly:
•
Fit the five threaded pins (2) on the
sprocket (5).
•
Install the sprocket mounting on the
sprocket mounting - threaded pin as-
sembly.
•
Hand-tighten the five self-locking nuts
(3).
NEVER INSTALL THE FINAL TRANSMISSION UNIT (6) ON
THE WHEEL TO TIGHTEN THE SELF-LOCKING NUTS.
TO PROTECT THE SPROCKET, INSTALL (WOODEN OR
ALUMINIUM) PROTECTIONS ON THE VICE JAWS. LOCK
THE SPROCKET ONLY IN A VICE. DO NOT LOCK ANY
OTHER COMPONENT OF THE FINAL TRANSMISSION
UNIT.
•
Lock sprocket in a vice.
CAUTION
TO AVOID POTENTIAL DISTORTIONS AND/OR INCORRECT COUPLING, TIGHTEN AS FOL-
LOWS:
•
Using an Allen key on the specific seat (1), lock the rotation of the threaded pin (2), and
applying half the specified torque, tighten the diametrically opposed elements in this se-
quence: (A) (B) (C) (D) (E).
•
Repeat the previous operation, applying the specified tightening torque.
CAUTION
IN THIS WAY THE PRESSURE EXERTED BY THE FIXING ELEMENTS WILL BE EVENLY DIS-
TRIBUTED ON THE COUPLING SURFACE.
SUSP - 386
TUONO V4 R