Rear Suspension - APRILIA RS 250 - 1998 Manual

REAR SUSPENSION

The rear suspension consists of a spring-
shock absorber unit, fixed to the frame by
means of silent-blocks and to the rear fork
by means of lever systems. For the setting
of the vehicle attitude, the shock absorber
is provided with a screw adjuster (1) for the
adjustment of the hydraulic braking with
extended shock absorber, a knob adjuster
(2) for the adjustment of the hydraulic
braking with compressed shock absorber,
a ring nut for the adjustment of the spring
c
preload (3) and a locking ring nut (4).
It is possible to adjust the shock
absorber axis distance to perso-
nalize the vehicle attitude.
For this kind of adjustment, contact an
aprilia Official Dealer.
ADJUSTING
THE REAR SHOCK ABSORBER
The standard setting of the rear shock ab-
sorber is such as to satisfy most driving
conditions at low and high speed, either
with reduced load and full load.
However, it is also possible to adjust the
setting according to the intended use of the
vehicle.
a
The adjusting ring nut must not
be screwed for more than 25 mm
from the beginning of the thread
(see figure). If this measure is excee-
ded, even the slightest unevenness on
the road surface will cause sudden
jerks and it will be useless to adjust the
screw (1).
64 use and maintenance RS 250
Slightly unscrew the locking ring nut (4)
by means of the appropriate spanner
&
.
Act on the adjusting ring nut (3) (shock
absorber spring preload adjustment)
(see figure).
If necessary, adjust the screw (1) (adju-
stment of the hydraulic braking with ex-
tended shock absorber) (see table).
Once the optimal attitude has been
obtained, tighten the locking ring nut (4)
completely.
a
Adjust the spring preload and
the hydraulic braking with exten-
ded shock absorber according
to the conditions of use of the vehicle.
When the spring preload is increased, it
is necessary to increase also the
hydraulic braking with extended shock
absorber, in order to avoid sudden jerks
while riding.
a
If the vehicle attitude is set for
full-load riding, it is advisable
not to rotate the screw (1) lef-
twards (anticlockwise), in order to avoid
sudden jerks while riding. If necessary,
contact an aprilia Official Dealer.
a
In order not to affect the correct
attitude of the vehicle, neither re-
move the small plug (5), nor
adjust the underlying valve, otherwise
there will be a nitrogen outflow.
a
Turn the screw adjuster (1) 2-3
clicks at a time, the knob adju-
ster (2) 5-6 clicks at a time and
the adjusting ring nut (3) one turn at a ti-
me. Test the vehicle repeatedly on the
road, until obtaining the optimal adjust-
ment.