74
use and maintenance
Rally 50
-
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Carefully read p. 53 (MAINTENANCE).
If the idle becomes irregular, too fast, or
too slow, it must be adjusted.
Adjust the idling after the first 312 mi (500
km) and every time it is irregular.
To adjust the idle:
a
WARNING
Exhaust gases contain carbon monox-
ide, which is extremely poisonous if in-
haled.
Do not start the engine in closed or bad-
ly-ventilated rooms.
Failure to observe this warning may
cause loss of consciousness or even
lead to death by asphyxia.
◆
Ride for a few miles until the engine
reaches the normal running temperature,
then stop the engine.
◆
Place the vehicle on the center stand.
◆
Remove the inspection cover, see p. 72
(REMOVING THE INSPECTION COV-
ER).
a
WARNING
Handle the battery with care. Neither
overturn the battery, nor spill the elec-
trolyte.
◆
Put the battery in its container.
a
WARNING
Always reconnect the battery breather
tube.
◆
Connect the battery breather tube (1).
◆
Connect, in order, first the positive cable
(red) (+) and then the negative (-).
◆
Connect an electronic revolution counter
to the spark plug cable.
◆
Start the engine.
The idle speed must be adjusted at 1,800
rpm ± 100 rpm. This is sufficiently fast to
keep the engine running smoothly, but suf-
ficiently slow to prevent the transmission
from engaging and rotating the rear wheel.
If it does not:
a
WARNING
Do not act on the air adjusting screw, to
avoid variations of the carburation set-
ting.
◆
Adjust the adjusting screw (2) positioned
on the carburetor.
By SCREWING IT clockwise, you increase
the engine rpm.
By UNSCREWING IT counterclockwise,
you decrease the engine rpm.
◆
Twist the throttle grip, accelerating and
decelerating a few times to make sure
that it functions correctly and to check if
the idling speed is constant.
NOTE
If necessary, contact your Local
aprilia
Dealer.
◆
Stop the engine.
◆
Disconnect the electronic revolution
counter from the spark plug cable.
◆
Replace the inspection cover, p. 72 (RE-
MOVING THE INSPECTION COVER).
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