
131
CAUSES POSSIBLE
WORK
Air filter clogged or dirty
Inefficient starter
Clean
Check: electric connections, circuit continuity, mecha-
nical sliding, and presence of power
HIGH FUEL CONSUMPTION
E
XCESSIVE
CONSUMPTION
CAUSES POSSIBLE
WORK
Secondary air metallic tube deteriorated
Secondary air circuit components faulty
Check the seal of the tubing against crankcase and secon-
dary air box. Check tubing between box and exhaust.
Check components and tubing. Check correct assem-
bly. Replace components if damaged.
EXCESSIVE EXHAUST NOISE
N
OISE
INCREASE
CAUSES POSSIBLE
WORK
No coolant within the cooling circuit
Air-bleed badly performed
Top up the level and ensure there are no leaks within
the circuit.
Repeat the operation
SURRISCALDAMENTO MOTORE
E
NGINE
OVERHEATING
Thermostat remains shut
Replace
Coolant leaks from radiator
Replace the radiator
Coolant leaks from system
Overhaul the system
Coolant leaks from crankcase draining hole
Replace coolant sealing ring on half-crankcase from
transmission-side
Coolant pump impeller bearing seized
Replace bearings and, if necessary, shaft and impeller
Mixer drive-belt snapped
Replace belt and check the cylinder assembly is not da-
maged
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