MOTO GUZZI GRISO 1100 Manual page 66

3
5
CAUTION
Even if only one outer spark plug (5)
needs replacing, always change both.
WARNING
Before carrying out the following
operations, let the engine and the
silencer cool down until they reach
room temperature, in order to avoid
burns.
The following procedures apply to both
cylinders.
66 use and maintenance Griso
4
Removal:
u Release the two screws (3) and remove
the retainer (4).
u Remove the spark plug cap (3).
u Remove any trace of dirt from the spark
plug base.
u Introduce the special spanner provided
in the tool kit on the spark plug.
u Insert the spanner (6) included in the tool
kit into the hexagonal seat of the spark
plug socket.
u Unscrew the spark plug and extract it
from its seat, taking care to prevent dust
or other substances from getting inside
the cylinder.
6
Inspection and cleaning:
Do not clean the spark plugs with a wire
brush and/or abrasive products, use
compressed air only.
Key:
– centre electrode (7);
– insulator (8);
– side electrode (9).
u
Always change a spark plug which has a
cracked insulator, corroded electrodes,
excessive deposits or when the tip (10) of
the central electrode (7) is rounded from
wear.
10
8
CAUTION
Make sure that there are neither carbon
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.
7
9