TROUBLE DIAGNOSIS
Engine temperature is too height
Water thermometer and temperature sensor don’t work
properly.
The thermostat is stuck to closed.
Insufficient coolant.
Water hose and jacket are clogged.
Fan motor malfunction.
The filler cap of radiator malfunction.
Engine temperature is too low
Water thermometer and temperature sensor malfunction.
Thermostat is stuck to open.
Coolant leaking
Water-Pump mechanical seal worn.
The o-rings located on water pump, thermostat and fan
thermo switch are deteriorated.
The water hoses are broken or aged.
Recommended Coolant
Use only high quality antifreeze/coolant mixed with distilled
water in a 50/50 or 60/40 ratio, depending on freeze protection
required in your area.
COOLING SYSTEM PRESSURE TEST
1. Remove the battery chamber cover that located under
handlebar.
2. Remove pressure cap and pressure test the cooling system
using a commercially available pressure tester.
3. The system must maintain 0.7 Bar (10 psi) for five minutes
or longer.
If pressure loss is evident within five minutes, check the
radiator, hoses; lamps and water pump seals for leakage.
PRESSURE CAP TEST
Never remove pressure cap when engine is
warm or hot. The cooling system is under
pressure and serious burns may result.
Allow the engine and cooling system to cool
before servicing.
1. Remove pressure cap and test cap using a commercially
available pressure cap tester.
2. The pressure cap relief pressure is 0.9 Bar (13 psi). Replace
cap if it does not meet this specification.
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General