APRILIA Pegaso 650 I.E., Service Manual

Page: 54 / 320

SERVICE AND SETTING UP
2 - 16
Pegaso 650 I.E.
2.9.2 IDLING ADJUSTMENT
Carefully read 0.5.1 (PRECAUTIONS AND GENERAL
INFORMATIONS).
NOTE
In case of start at low ambient temperature
[near or below 0 °C (32 °F)] and in any case if the normal
operating temperature has not been reached, anomalies
may be noticed in the engine idling speed. This is normal,
the engine idling speed returns to a regular value when
the engine reaches its normal running temperature.
For a correct check of the engine idling speed, pro-
ceed as follows:
◆
Ride for a few miles until reaching the normal running
temperature.
◆
Position the gear lever in neutral (green warning light
“
/
” on).
◆
Check the engine idling rpm on the revolution counter.
The engine idling speed must be about 1350 ± 100 rpm.
If the engine idling speed falls within the values indi-
cated, do not perform any operation to modify it.
a
CAUTION
An excessive increase in the engine idling speed may
cause irregularities in the operation of the engine and
damage the engine and other components.
If necessary, proceed as follows:
a
CAUTION
For a correct adjustment of the engine idling speed it
is absolutely necessary to respect the times and the
engine temperature interval indicated below.
a
CAUTION
Risk of burns.
Some parts of the vehicle reach very high tempera-
tures (for example, the exhaust pipe and to a lesser
extent the exhaust pipe guard).
Wear safety gloves to protect yourself from the high-
temperature parts of the vehicle.
Proceed with care and absolutely avoid any contact
with the exhaust pipe guard.
The coolant temperature in the engine must absolute-
ly be included between 78 °C (172 °F) and 94 °C
(201°F). To identify the correct interval, check the po-
sition of the pointer on the coolant temperature indi-
cator when the fan is operated; considering that the
fan starts at 94 °C (201 °F), keep this value as refer-
ence point for the upper limit of the interval and de-
termine the position of the pointer on the instrument;
at this point it is possible to find the initial tempera-
ture of 78 °C (172 °F) to carry out the adjustments.
◆
Remove the saddle, see p 7.1.7 (REMOVING THE
SADDLE).
◆
Release the idling speed adjustment cable (1) from the
cable guide positioned behind the right standard of the
frame.
◆
Fasten (not rigidly) the idling speed adjustment cable to
the spark plug cable with a clamp, positioning the
clamp between the knob and the plastic washer.
NOTE
The successive operations must be carried out
very quickly, in order to maintain the temperature values
within the interval prescribed and to avoid losing the ad-
justments made.
◆
Bring the engine temperature to 78 °C (172° F).
◆
Stop the engine.
a
CAUTION
Do not restart the engine.
◆
Put the gearshift into neutral.
◆
Turn the ignition switch to position “
2
”.
Release 00/2002-02