APRILIA ETX 125 - 1998 Manual page 49

ADJUSTMENT
If after the check it is necessary to adjust
the chain tension, proceed as follows:
Lock the rotation of the wheel pin (2) by
means of the appropriate spanner.
c
Loosen the wheel nut (3).
For the rear wheel centering,
numbered reference marks are
provided on the chain adjuster cams (4)
and (5) in correspondence with each
notch.
Act on the right (4) and left (5) chain ad-
juster cams and adjust the chain slack,
making sure that the reference marks
coincide on both sides of the vehicle.
Lock the rotation of the wheel pin (2) by
means of the appropriate spanner.
Tighten the wheel nut (3).
Wheel nut (3) driving torque:
80 Nm (8 kgm).
Check the chain slack, see p. 48
(CHECKING THE SLACK).
CHECKING THE WEAR OF CHAIN,
PINION AND CROWN
Further, check the chain and sprockets
and make sure that they do not present:
Damaged rollers.
Loose pins.
Dry, rusty, crushed or seized links.
Excessive wear.
Lacking O rings.
Sprocket or teeth excessively worn or
damaged.
a
If the chain rollers are damaged,
the pins are loose and/or the O
rings are damaged or lacking, it
is necessary to change the whole chain
unit (both sprockets and chain).
Check the wear of U-shaped chain guide
(6)and of the chain tightening roller (7).
Finally, check the wear of the rear fork
protection shoe.
a
Lubricate the chain frequently,
especially if there are dry or
rusty parts. The crushed or
seized links must be lubricated and
made work again.
If this is not possible, contact an Official
Dealer aprilia, who will provide for
changing the chain.
LUBRICATION AND CLEANING
a
Carry out the adjustment, lubri-
cation, cleaning and change of
the chain with great care.
c
Remember: 1 mile = 1.6 km
1 km = 0.625 miles
Lubricate the chain every 500 km or when-
ever necessary.
Lubricate the chain with spray grease for
chains only, see p. 72 (LUBRICANT
CHART).
Never wash the chain with water jets,
steam jets, high-pressure water jets and
highly inflammable solvents.
use and maintenance ETX 125 49