Removing The Thermostat Assembly; Checking The Thermostat; Assembling The Thermostat Assembly; Installing The Thermostat Assembly - Yamaha R1 Series 2015 Service Manual

EAS31660

REMOVING THE THERMOSTAT ASSEMBLY

1. Remove:
• Hose clamp (Clic-R)
Refer to "REMOVING THE RADIATOR" on
page 6-2.
• Radiator inlet hose
2. Remove:
• Thermostat assembly
EAS30443

CHECKING THE THERMOSTAT

1. Check:
• Thermostat
Does not open at 69–73 C (156–163 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
159.8
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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2. Check:
• Thermostat housing
• Thermostat housing cover
Cracks/damage
EAS30444
ASSEMBLING THE THERMOSTAT
ASSEMBLY
1. Install:
• Thermostat housing "1"
• Thermostat "2"
• O-ring "3"
New
• Thermostat housing cover "4"
Thermostat housing cover nut
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
TIP
Install the thermostat with its breather hole "a"
facing up.
4
EAS30445
INSTALLING THE THERMOSTAT
ASSEMBLY
1. Install:
• Thermostat assembly
6-7
THERMOSTAT
85
185
Replace.
a
1
2
2
3