Drive Chain - APRILIA RS 125 TUONO - 2003 Manual

RS 125 Tuono_Ing_book_my03.book Page 54 Tuesday, April 29, 2003 3:11 PM

DRIVE CHAIN

C a r e f u l l y r e a d p a g e 4 3 ( M A I N T E -
NANCE).
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).
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 Conces-
sionario Ufficiale aprilia, who will ensure
you prompt and accurate servicing.
54
use and maintenance RS 125 Tuono
Incorrect maintenance may cause
the untimely wear of the chain
and/or damages to the pinion
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:
N Stop the engine.
Position the vehicle on the stand.
N
N Position the shifting lever in neutral.
Make sure that the vertical oscillation, in
N
an intermediate point between pinion and
crown in the lower part of the chain, is
about 25 ÷ 35 mm.
N Move the vehicle forwards, or turn the
wheel, in order to be able to check the ver-
tical oscillation of the chain even when the
wheel turns; the slack must be constant in
all the rotation phases of the wheel.
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 Conces-
sionario Ufficiale aprilia. To prevent the
risk of seizures, lubricate the chain fre-
quently, see page 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).
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:
N Position the vehicle on the appropriate
rear support stand , see page 47
(POSITIONING THE VEHICLE ON THE