Yamaha FJR13AG Service Manual page 447

EAS30443
CHECKING THE THERMOSTAT
1. Check:
• Thermostat
Does not open at 69.0–73.0 °C (156.20–
163.40 °F) → Replace.
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a. Suspend the thermostat "1" in a container "2"
filled with water.
b. Slowly heat the water "3".
c. Place a thermometer "4" in the water.
d. While stirring the water, observe the thermo-
stat and thermometer's indicated tempera-
ture.
71±2°C
(159.8±3.6°F)
A. Fully closed
B. Fully open
TIP
If the accuracy of the thermostat is in doubt, re-
place it. A faulty thermostat could cause serious
overheating or overcooling.
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6-8
2. Check:
• Thermostat housing
Cracks/damage → Replace.
3. Check:
• Thermostat hoses
• Thermostat pipes
• Radiator inlet hose
• Thermostat cover/Radiator filler pipe
EAS30445
INSTALLING THE THERMOSTAT
ASSEMBLY
1. Install:
• Copper washer
New
• Coolant temperature sensor
Coolant temperature sensor
22 Nm (2.2 m·kgf, 16 ft·lbf)
ECA23410
NOTICE
Use extreme care when handling the coolant
temperature sensor. Replace any part that
was dropped or subjected to a strong im-
pact.
2. Install:
• Thermostat "1"
• Thermostat housing "2"
TIP
Install the thermostat with its breather hole "a"
facing up.
2
3. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-29.
4. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
THERMOSTAT
a
1