APRILIA 8140172, Service And Repair Manual

Page: 41 / 279

SERVICE AND SETTING UP
2 - 14
RSV mille
30!2+ 0,5'3
Carefully read 0.2.1 (PRECAUTIONS AND GENERAL
INFORMATIONS).
Check the spark plugs every 7500 km (4687 mi) or 8
months, change them every 15000 km (9375 mi) or 16
months.
Periodically remove the spark plugs and clean them care-
fully, removing carbon deposits; change them if neces-
sary.
In case of use on racetracks, change the spark plugs eve-
ry 3750 km (2343 mi).
To reach the spark plugs:
a
WARNING
Allow the engine to cool down until it reaches room
temperature.
◆ Lift the fuel tank, see 2.8 (LIFTING THE FUEL TANK).
NOTE
The vehicle is equipped with two spark plugs per
cylinder.
The following operations refer to one spark plug only, but
are valid for both.
To remove and clean the spark plug, proceed as follows:
a
WARNING
Never disconnect the spark plug cap with the engine
running, since you may get an electric shock from
the ignition system.
◆ Remove the cap (1) of the spark plug (2).
◆ Remove any trace of dirt from the spark plug base.
◆ Introduce the special spanner provided in the tool kit on
the spark plug.
◆ Insert the 13 mm fork spanner provided in the tool kit in
the hexagonal seat of the spark plug spanner.
◆ Unscrew the spark plug and extract it from its seat, tak-
ing care to prevent dust or other substances from get-
ting inside the cylinder.
a
CAUTION
This vehicle is fitted with spark plugs featuring plati-
num-type electrodes.
When cleaning, do not use wire brushes and/or abra-
sive products. Use e jet of compressed air only.
– centre electrode (3);
– insulator(4);
– side electrode (5).
◆ Make sure the spark plug’s electrodes and insulator are
free of carbon deposits and do not feature signs of cor-
rosion.
Where necessary, clean with a jet of compressed air.
If the spark plug should feature cracks on the insulator,
corroded electrodes or excessive deposits, or if the cen-
tre electrode (3) has a rounded end (see figure), the
spark plug must be replaced.
You are strongly advised to replace spark plugs with
standard plugs.
Recommended spark plugs:
NGK R DCPR9E
(alternatively NGK R DCPR8E).