MOTO GUZZI nevada User Manual page 83

2
To remove, proceed as follows:
CAUTION
Never disconnect the spark plug cap with
the engine running, since you may get an
electric shock from the ignition system.
Do not reverse the position of the two
spark plug caps. Do not remove the two
spark plug caps at the same time.
WARNING
During this operation, always wear
goggles that provide your eyes with
360° protection. Be very careful when
using compressed air jets, as they can
c a u s e s e r i o u s p e r s o n a l i n j u r y i f
directed towards your body.
u Remove the spark plug cap (1).
u Remove any trace of dirt from the spark
plug base.
u Fit the special socket included in the tool
kit to the spark plug.
u Insert the spanner (2) with its handle -
i n c l u d e d i n t h e t o o l k i t - i n t o t h e
hexagonal flat of the spark plug socket.
u Unscrew the spark plug and extract it
from its seat, making sure no dust or dirt
fall into the cylinder.
Inspection and cleaning:
CAUTION
This motorcycle uses spark plugs with
platinum electrodes. Do not clean with
w i r e b r u s h e s a n d / o r
compounds. Clean with compressed air
only.
Key:
– center electrode (3),
– insulator (4);
– side electrode (5).
Check electrodes and insulator for carbon
u
deposits or traces of corrosion and blow
them with compressed air if needed.
Always change a spark plug which has a
cracked insulator, corroded electrodes,
excessive deposits or when the tip (6) of
the central electrode (3) is rounded from
wear.
Make sure the new spark plug has the
correct thread pitch and reach. A thread
reach which is too short will let carbon
build up in the spark plug hole thread,
leading to engine damage when the
r i g h t s p a r k
subsequently. Use recommended spark
a b r a s i v e
plugs only, see page 100 (TECHNICAL
DATA). A spark plug of the wrong rating
may shorten engine life and cause loss
of performance.
Electrode gap should be checked using
a wire gauge (7) to avoid damaging the
platinum coating.
Never attempt to adjust electrode gap.
Electrode gap should be 0.026 - 0.028
inch (0.6 - 0.7 mm).
0.026 - 0.028 inch 0.026 - 0.028 inch
(0.6 - 0.7 mm) (0.6 - 0.7 mm)
8
7
CAUTION
p l u g i s r e f i t t e d
CAUTION
use and maintenance Nevada 83