Spark Plug - APRILIA ATLANTIC 500 Manual

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SPARK PLUG

Read page 40 (MAINTENANCE) carefully.
Check the spark plug every 6000 km (3750
mi) and change it every 12000 Km (7500 mi).
At regular intervals, remove the spark plug
and clean off any carbon deposits or replace
as required.
In order to gain access to the spark plug:
Remove the left inspection cover, see page
◆
53 (REMOVING THE RIGHT AND LEFT
INSPECTION COVERS).
56
use and maintenance Atlantic 500
0,7-0,8 mm 0,7-0,8 mm
Removal and cleaning:
WARNING
To avoid any burns, allow the engine and
muffler to cool down completely before
proceeding.
◆ Move away the coolant pipe (1) that might
interfere with the following operations.
Pull the HT cable cap (1) off the spark
◆
plug.
Remove any traces of dirt from the spark
◆
plug base. Fit the suitable spark plug tool
(supplied with the tool kit) to the spark
plug. Unscrew and extract the spark plug.
Ensure that no dust or foreign matter fall
into the cylinder.
◆ Check electrode and insulating material
for carbon deposits or corrosion. Clean
off deposits with a metal wire or wire brush,
if needed.
Blow with an air line to prevent residues
◆
from entering the engine. A spark plug
must be changed when: the insulator is
cracked; the electrodes show traces of
corrosion or exceeding deposits.
Check the electrode gap with a feeler
◆
gauge. Electrode gap should be 0.7 – 0.8
mm. If it needs adjusting, bend the earth
electrode carefully.
◆ Make sure the washer is in good condition.
Fit the washer and screw the spark plug
finger-tight to avoid damaging the thread.
Tighten using the supplied tool. Screw in
◆
the spark plug by one half turn to
compress the washer.
Spark plug torque wrench setting:
12 ÷ 14 Nm (1.2 ÷ 1.4 kgm).
WARNING
It is essential to tighten the spark plug
properly. A loose spark plug will cause
engine overheating and result in severe
damage.
Replace with recommended spark plugs
only. See page 70 (TECHNICAL DATA). Using
a spark plug other than specified might
compromise engine performance and life.
◆ Refit the spark plug cap securely onto the
spark plug, so that it will not work itself
loose when exposed to engine vibration.
◆ Refit the left inspection cover, see page
53 (REMOVING THE RIGHT AND LEFT
INSPECTION COVERS).