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Carefully read p. 61 (MAINTENANCE).
Clean the spark plug every 3,750 mi
(6,000 km); change it every 7,500 mi
(12,000 km).
Periodically remove the spark plug and
clean it carefully, removing carbon depos-
its; change it if necessary.
To reach the spark plug:
N
Remove the fuel tank, see p. 80 (RE-
MOVING THE FUEL TANK).
To remove and clean the spark plug:
WARNING
Before carrying out the following opera-
tions, let the engine and the exhaust si-
lencer cool down until they reach room
temperature, in order to avoid burns.
N
Remove the spark plug cap (1).
86
use and maintenance Pegaso 650
During this operation, always wear gog-
gles which provide your eyes with 360°
protection. Be very careful using com-
pressed air jets, they can cause serious
personal injury if directed towards your
body.
N
Using compressed air, blow all the dirt
away from the base of the spark plug.
Using the special spark plug wrench
from the tool kit, unscrew the spark plug.
Make sure that no dirt falls into the cylin-
der through the spark plug hole.
N
Inspect the spark plug, and insure that
there are no carbon deposits nor corro-
sion marks on either electrode or the ce-
ramic nose that surrounds the center
electrode. If necessary, clean the spark
plug with a proprietary spark plug clean-
er, and a stainless steel brush.
-
WARNING
N
Using compressed air, carefully blow out
the spark plug after you have cleaned it.
Inspect for cracks on the insulating mate-
rial, electrode corrosion or erosion, or
deposits that you cannot remove.
If the spark plug shows any of these de-
fects, it must be replaced.
N
Check the spark plug gap with a thick-
ness gauge.
N
The gap must be 0.024 – 0.028 in (0.6 –
0.7 mm); if necessary adjust it, carefully
bending the ground (outside) electrode.
N
Make sure the gasket is in good condi-
tion. With the gasket on, screw the spark
plug into the head by hand.
N
Tighten the spark plug with the spark
plug wrench, approximately one-half turn
after it first snugly contacts the cylinder
head.
Spark plug tightening torque:
14.47 ftlb (20 Nm).
CAUTION
The spark plug must be well tightened,
otherwise the engine may overheat and
be seriously damaged.
Use the recommended type of spark
plug only, see p. 100 (TECHNICAL DA-
TA), in order not to compromise the life
and performance of the engine.
N
Position the spark plug cap (1) properly,
so that it does not come off due to the vi-
brations of the engine.
N
Replace the fuel tank, see p. 80 (RE-
MOVING THE FUEL TANK).
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