Adjusting The Throttle Control; Idling Adjustment - APRILIA RS 50 Workshop Manual

Routine maintenance operations

ADJUSTING THE THROTTLE CONTROL

Read carefully (SERVICING SCHEDULE).
WARNING
If the throttle sticks open, you will lose control of your
motorcycle and a serious accident could result.
If any fastener in the throttle system becomes loose,
likewise you will lose control of your motorcycle.
Either situation can lead to an upset or collision with
subsequent serious injury or death.
The play of the throttle cable must be between 2 - 3
mm (0.08 - 0.12 in), measured at the edge of the grip,
see the illustration above. To adjust the cable:
Position the motorcycle on the stand.
Pull back the rubber boot (1).
Loosen the lock nut (2).
Rotate the adjuster (3) in such a way as to restore the
prescribed value.
After the adjustment, tighten the lock nut (2) and check
the play again. Replace the rubber boot (1).
WARNING
Exhaust gases contain carbon monoxide, which is
extremely poisonous if inhaled. Do not start the
engine in closed or badly-ventilated rooms. Failure
to observe this warning may cause loss of con-
sciousness or even lead to death by asphyxia.
After you have adjusted the throttle, rotate the
handlebars full left and full right with the engine
idling. Check to ensure that the idle sound is not
affected by this. Also check that the throttle
smoothly and fully closes when released.
Failure to observe this warning can lead to an
accident with subsequent injury or even death.

IDLING ADJUSTMENT

Read carefully (SERVICING SCHEDULE).
If the idle becomes irregular, too fast, or too slow, it
must be adjusted.
To adjust the idle:
WARNING
Exhaust gases contain carbon monoxide, which is
extremely poisonous if inhaled.
Do not start the engine in closed or badly-venti-
lated 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 normal
running temperature, (Coolant temperature indicator " ").
Put the shift lever (4) in neutral so that the green " "
light is on.
Observe the tachometer.
The engine must idle between 1,100 ± 100 rpm.
If it does not:
Position the motorcycle on the stand.
Remove the rubber plug (5) (right fairing).
Insert a flat-tip screwdriver in the hole and adjust the
screw (6) 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.
2-12
Release 00 2001-03
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4
6
5
ch. 2
RS 50
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