Checking The Thermostat; Installing The Thermostat - Yamaha YP250R 2005 Service Manual

THERMOSTAT
EAS00462

CHECKING THE THERMOSTAT

1. Check:
• thermostat 1
Does not open at 80.5 ~ 83.5 °C (176.9 ~
182.3 °F) → Replace.
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a. Suspend the thermostat in a container filled
with water.
b. Slowly heat the water.
c. Place a thermometer in the water.
d. While stirring the water, observe the ther-
mostat and thermometer's indicated tem-
perature.
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1 Thermostat
2 Container
3 Thermometer
4 Water
È Fully closed
É Fully open
NOTE:
_
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause seri-
ous overheating or overcooling.
2. Check:
• thermostat cover
Cracks/damage → Replace.
3. Check:
• thermostat inlet hose
• thermostat outlet hose
Cracks/damage → Replace.
EAS00467

INSTALLING THE THERMOSTAT

1. Fill:
• cooling system
(with the specified amount of the recom-
mended coolant)
Refer to "CHANGING THE COOLANT" in
chapter 3.
2. Check:
• cooling system
Leaks → Repair or replace any faulty part.
6 - 5
COOL
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