APRILIA RS4 125 Service Station Manual page 239

RS4 125
IF THE CHAIN ROLLERS ARE DAMAGED AND / OR THE PINS ARE LOOSE, THE ENTIRE CHAIN
UNIT (PINION, CROWN AND CHAIN) SHOULD BE REPLACED.
LUBRICATE THE CHAIN ON A REGULAR BASIS, PARTICULARLY IF YOU DETECT DRY OR
RUSTY PARTS.
FLATTENED OR JAMMED CHAIN LINKS SHOULD BE LUBRICATED AND GOOD OPERATING
CONDITIONS RESTORED.
Installing
•
Check the correct positioning of the chain on the pinion and the sprocket.
•
Fit the chain with the two ends joined at a point between the pinion and the sprocket on the
lower branch of the chain.
•
Join the two ends of the chain and fit the master link pins from the inside to the outside.
•
Insert the plate on the pins.
•
Fit the clip on the pins.
CAUTION
THE MASTER LINK CLIP MUST BE FITTED WITH ITS OPEN
SIDE FACING DIRECTION OPPOSITE THE CHAIN FOR-
WARD MOVEMENT.
Adjusting
To check clearance:
•
Shut off the engine.
•
Rest the vehicle on its stand.
•
Engage neutral gear.
•
Check the vertical oscillation at a point
between the pinion and the sprocket on
the lower branch of the chain.
•
If the chain clearance is less than 25
mm (0.98 in) or exceeds 30 mm (1.18
in), adjust the chain.
•
Move the vehicle forward so as to
check vertical oscillation of the chain in
other positions too. clearance should
remain constant at all wheel rotation
phases.
CAUTION
Chassis
CHAS - 239