Front Fork Adjustment - APRILIA tuono v4 Owner's Manual

Front fork adjustment (03_05)

•
Operating the front brake lever, press the handlebar repeatedly to send the
fork fully down. The stroke should be soft and there should be no oil marks
on the stems.
•
Check the tightening of all the elements and the correct operation of the front
and rear suspension joints.
CAUTION
PLEASE CONTACT AN Official Aprilia Dealer TO HAVE THE FRONT FORK OIL
CHANGED AND ITS OIL SEALS REPLACED.
03_05
The front suspension consists of a hydraulic fork connected to the headstock by
means of two plates.
To adjust the settings for this vehicle, each fork is equipped with an upper adjustment
screw (1) to set the rebound damping; an upper nut (3) to adjust the spring preloading
and a lower adjustment screw (2) to modify the compression damping.
TO PREVENT DAMAGE, DO NOT FORCE THE ADJUSTER (1-2) ROTATION BE-
YOND THE RESPECTIVE END OF TRAVEL IN EITHER DIRECTION. SET BOTH
STEMS WITH THE SAME SPRING PRELOAD AND DAMPING TOLERANCES:
RIDING THE VEHICLE WITH A DIFFERENT ADJUSTMENT FOR THE TWO
STEMS REDUCES ITS STABILITY. IF YOU INCREASE SPRING PRELOAD, YOU
ALSO NEED TO INCREASE REBOUND DAMPING TO PREVENT SUDDEN JERKS
WHILE RIDING.
Standard front fork setting is adjusted to suit most high and low speed riding condi-
tions, whether the vehicle is partially or fully loaded.
However, the setting can be modified for specific needs according to vehicle use.
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