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For the check and cleaning:
CAUTION
This vehicle is fitted with spark plugs
with platinum electrodes.
Do not clean the spark plugs with a wire
brush and/or abrasive products, use
compressed air only.
Key:
– centre electrode (3);
– insulating (4);
– side electrode (5).
Make sure that there are neither carbon
u
deposits, nor corrosion marks on the
e l e c t r o d e s a n d o n t h e i n s u l a t i n g
m a t e r i a l ; i f n e c e s s a r y , b l o w w i t h
compressed air to clean them.
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.
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 page 110 (TECHNICAL
DATA), in order not to compromise the
life and performance of the engine.
Electrode gap should be checked using
a wire gauge (7) to avoid damaging the
platinum coating.
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Check electrode gap with a wire gauge
(7).
CAUTION
Never attempt to adjust electrode gap.
Electrode gap should be 0.6 - 0.7 mm. If
not so, change the spark plug.
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Make sure that the washer (8) is in good
condition.
For the installation:
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Position the washer (8) and screw in the
spark plug by hand in order not to
damage the thread.
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Tighten the spark plug by means of the
spanner you will find in the tool kit, giving
it half a turn to compress the washer.
Spark plug tightening torque: 20 Nm (2
kgm).
CAUTION
The spark plug must be well tightened,
otherwise the engine may overheat and
be seriously damaged.
Position the spark plug (2) cap (1)
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properly to prevent it from coming off due
to engine vibration.
NOTE
Repeat the above procedure for
the spark plug of the other cylinder.
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Put back the fuel tank, see page 77
(LIFTING THE FUEL TANK).
use and maintenance RSV 1000 TUONO R
93
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