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INEFFICIENT ENGINE
CAUSE
Irregular feed of petrol
to the carburetor. '
Main jet partly clogged.
Carburetor butterfly valve
does not open comple-
tely.
I The float needle does not
close properly.
Petrol of bad quality.
The spark is not of the
right type.
The sparking plug cable
sparks externally.
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76
REMEDY
Clean the carburetor filter,
the petrol cock filter and
the petrol pipe.
Clean the main jet by means
of an air blast.
Readjust the valve travel by
means of the adjustment
screw of the carburetor
Bowden cable (at a Ducati
Service Garage).
Clean out the carburetor
and especially the needle
5eat (at a Ducati Servicing
Garage) .
Empty the petrol tank and re-
fill at a reliable garage.
If the sparking plug over-
heats, you wil have preigni-
tion, knocking, and misses,
especially at high revs. If
the sparking plug remams
too cold, you wil have no
ignition. because the electro-
des wil short-circuit. Use
the right type of sparking
plug; we advise the use of
a plug having a thermal fi-
gure of 260 of the Bosch in-
ternational scale.
Tighten the plug down welL. A
copper washer should al.
ways be placed between the
sparking plug and its sea-
ting in the cylinder head.
Change the cable or repair
the insulation (at a Ducati
Servicing Garage).
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