APRILIA RS 125 - 1998 Manual page 54

$2)6% #(!).
Carefully read p. 43 (MAINTENANCE).
The vehicle is equipped with a chain with
ring link joint.
In case of disassembly and reassembly of
the chain, make sure that the clip (1) of the
ring link joint has its open side opposite the
travelling direction (see figure).
a
An excessive slackening of the
chain can cause it to come off of
the sprockets, which often results
in accidents or serious damage to the ve-
hicle.
Periodically check the slack and adjust it
if necessary, see beside (ADJUSTMENT).
To change the chain, contact an APRILIA
Official Dealer, who will ensure you
prompt and accurate servicing.
54
use and maintenance RS 125
a
Incor rect maint enance may
cause the untimely wear of the
chain and/or damages to the pin-
ion and/or the crown.
Carry out the maintenance operations
more frequently if you use the vehicle in
difficult conditions or on dusty and/or
muddy roads.
CHECKING THE SLACK
To check the slack, proceed as follows:
Stop the engine.
Position the vehicle on the stand.
Position the shifting lever in neutral.
Make sure that the vertical oscillation, in
an intermediate point between pinion
and crown in the lower part of the chain,
is about 25 35 mm.
Move the vehicle forwards, or turn the
wheel, in order to be able to check the
vertical oscillation of the chain even
when the wheel turns; the slack must be
constant in all the rotation phases of the
wheel.
a
If in some positions the slack is
higher than in others, this means
that there are crushed or seized
links; in this case, contact an APRILIA Of-
ficial Dealer. To prevent the risk of sei-
zures, lubricate the chain frequently, see
p. 55 (CLEANING AND LUBRICATION).
If the slack is uniform, but higher or lower
t h a n 2 5 3 5 m m , a d j u s t i t , s e e
below (ADJUSTMENT).
c
ADJUSTMENT
To adjust the chain it is neces-
sary to use the appropriate rear
&
support stand .
If after the check it is necessary to adjust
the chain tension, proceed as follows:
Position the vehicle on the appropriate
&
rear support stand , see p. 47 (POSI-
TIONING THE VEHICLE ON THE REAR
SUPPORT STAND m).