APRILIA RSV mille 956X Service And Repair Manual page 223

FUEL SUPPLY SYSTEM
4.8.10 CYLINDER SYNCHRONIZATION
Carefully read 0.2.1 (PRECAUTIONS AND GENERAL
INFORMATIONS) and 1.2.1 (FUEL).
The cylinders must be synchronized whenever the engine
runs smoothly no longer when idling.
Run a few kilometres until reaching the regular working
temperature.
a
CAUTION
The cylinder syncronization must be carried out with
the engine warmed up:
– coolant temperature 80-100°C (176-212°F);
– room temperature 20-30°C (68-86°F).
NOTE
Have the following special tools
– intake flange for vacuometer (1) (cod. 8140267);
– vacuometer (3) (cod. 8140256);
– exhaust gas tester (4) (cod. 8140196);
– set of pipes for exhaust gas tester (5) (cod. 8140202).
a
WARNING
Fuel vapours are harmful for health.
Before proceeding, make sure that the room in which
you are working is properly ventilated.
Do not inhale fuel vapours.
Avoid contact of fuel with the skin.
Do not smoke or use naked flames.
Do not pollute the environment with the incorrect di-
sposal of fuel.
Lift the petrol tank, see 2.8 (LIFTING THE FUEL
TANK).
Loosen and remove the two front and rear exhaust pipe
plugs (6-7).
NOTE
Upon reassembly, apply LOCTITE
threaded of the plugs (6-7)
Connect the exhaust gas tester pipes (5):
– connect the two rigid pipes to the appropriate exhaust
pipe outlets;
– connect the other pipe to the exhaust gas tester (4).
Start the engine and make sure the idling rpm is 1250 ±
100 rpm. If this is not the case, adjust accordingly, see
2.11.2 (IDLING ADJUSTMENT).
Check the tester (5) for the CO values.
They should correspond to the values indicated and be
the same for both cylinders.
CO values for both cylinders:
0.8-1.3% at 1250 ± 100 rpm.
If the CO value measured in one or both of the cylin-
ders is different from the value indicated, adjust one or
both of the screws (8-9) accordingly to restore the cor-
rect value.
Check the idling rpm and, if it does not correspond to
1250 ± 100 rpm, adjust accordingly, see 2.11.2
(IDLING ADJUSTMENT) and then check the CO va-
lues again and, where necessary, repeat the sychroni-
zation procedure.
NOTE
If it is not possible to obtain the preset CO val-
ues, the sparking plugs must be replaced, see 2.7
(SPARK PLUGS).
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8150 on the
RSV mille