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APRILIA Pegaso 650 Manual De Taller página 291

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8.1.2 CARBURETTOR
DEFECT
Difficult starting.
Irregular operation at
idling or slow running.
Irregular operation at
medium or high speed.
Overflow and fuel level
variations.
8.1.3 RADIATOR
DEFECT
Engine overheats.
Engine does not reach
proper temperature.
SYMPTOM AND POSSIBLE CAUSE
1) Starting jet clogged.
2) Starting duct clogged.
3) Air infiltration from gasket between cold start device body
and carburettor.
4) Cold start device choke not working correctly.
5) Battery partially exhausted.
1) Idling jet clogged or loose.
2) Air infiltration from carburettor or cold start device sleeve.
3) Cold start device choke not completely closed.
1) Full-power jet clogged.
2) Taper needle encrusted and/or worn.
3) Throttle valve not working properly.
4) Filter clogged.
1) Needle valve worn or damaged.
2) Float not working properly.
3) Foreign matter sticking to needle valve.
4) Carburettor breather pipe clogged.
5) Needle valve spring broken of deformed.
6) Fuel level too high or too low.
SYMPTOM AND POSSIBLE CAUSE
1) Insufficient coolant.
2) Radiator blade unit clogged by dirt or foreign matter.
3) Thermostat valve defective, locked in closing position.
4) Coolant passages clogged.
5) Air in cooling circuit.
6) Coolant pump defective.
7) Use of unsuitable coolant.
8) Thermal switch defective.
9) Electrofan disconnected or faulty.
1) Thermostat valve defective, locked in complete open posi-
tion.
2) Room temperature too cold.
3) Thermal switch defective.
4) Electrofan defective.
REPAIRS
REMEDY
Clean.
Clean
Check and tighten.
Repair.
Check and recharge.
Check and clean.
Check.
Check and clean.
Check and clean.
Check and clean.
Check operation of throttle
valve.
Check and clean.
Change.
Check and adjust
Clean.
Clean.
Change.
Adjust fuel level.
REMEDY
Add coolant.
Clean.
Change.
Clean.
Bleed.
Change.
Change coolant.
Change.
Connect or change.
Change.
Put protective shield on
radiator.
Change.
Check or change.
8
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