APRILIA Pegaso 650 I.E., Service Manual

Page: 49 / 320

SERVICE AND SETTING UP
2 - 11
Pegaso 650 I.E.
30!2+ 0,5'
Carefully read 0.5.1 (PRECAUTIONS AND GENERAL
INFORMATIONS).
For the maintenance intervals, see 2.1.1 (REGULAR
SERVICE INTERVALS CHART) under:
– Sp ark p lug.
To reach the spark plug:
a
CAUTION
Let the engine cool down until it reaches room tem-
perature.
Never disconnect the spark plug cap with the engine
running, since you may get an electric shock from
the ignition system.
◆
R emove the fuel tank, see 7.1.1 (REMOVAL OF THE
FUEL TANK).
For the removal, proceed as follows:
◆
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.
◆
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.
For the check and cleaning:
Key:
– centre electrode (3);
– insulating (4);
– side electrode (5).
◆
Make sure that there are neither carbon deposits, nor
corrosion marks on the electrodes and on the insulating
material; if necessary, clean them with a pressurized air
jet.
If the spark plug has crackings on the insulating material,
corroded electrodes, excessive deposits or the tip (6) of
the central electrode (3) is rounded, it must be changed.
a
CAUTION
When changing the spark plug, check the thread
pitch and length.
If the threaded part is too short, the carbon deposits
will accumulate on the thread seat, and therefore the
engine may be damaged during the installation of the
right spark plug.
Use the recommended type of spark plugs only, see
1.5 (TECHNICAL SPECIFICATIONS), in order not to
compromise the life and performance of the engine.
Follow
ã
Release 00/2002-02
- 00