Spark Plugs - MOTO GUZZI 850-T3 Owner's Manual

Timing the left cylinder (see fig. 31)
• rotate the flywheel anticlockwise unt il the pi-
ston is at the end of its compression stroke (both
. alves closed) . In this position , mark «8 " on the
' ,ywheel (TDC of left cylinder) should coincide
-.'l ith mark
,< h
on the rim of the inspection hole;
• rotate the flywheel clockwise until the fly-
·.vheel mark «3.. (fixed advance) is in perfect
c oincidence with mark «1 .. on the rim on the in-
spection hole. In this position the ignition fixed
advance mark «3 .. is 2' from TDC (<< 8 ») that's at
the beginning of the points separation (<< B» in
fig. 30) .
t;
the points (<<A» and «8 » in fig. 30) do not start
opening in the above positions, the ignition tim -
ing needs adjustment.
Ignition data
initial advance (fixed) 2'
Automatic advance 31'
Total advance 33'
Breaker points gap : mm 0,37 -+- 0,42
This checking is best carried out by our dealers.
Spark plugs
Type spark plugs (see page 5)
Points gap 0,6 mm .
The spark plugs are best cleaned with petrol and
a wire brush using a needle for the inner part.
In re-fitting the plugs ensure they are properly
started by hand for a few turns completing the
operation by means of the plug wrench in the
tool kit. If not properly started the cylinder head
thread may get stripped .
For all events, the plugs have to be replaced
every 10000 km a. even if they still appear to be
in good cond itio n.
45