Yamaha FZ6-ST Supplementary Service Manual page 363

EAS00462
CHECKING THE THERMOSTAT
1. Check:
S thermostat 1
1
Does not open at 71 X 85_C (160 X 185_F)
! Replace.
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 thermo-
stat and thermometer's indicated tempera-
ture.
1 Thermometer
2 Water
3 Thermostat
4 Container
A Fully closed
B Fully open
NOTE:
If the accuracy of the thermostat is in doubt, re-
place it. A faulty thermostat could cause serious
overheating or overcooling.
2. Check:
S thermostat cover
Cracks/damage ! Replace.
6-9
COOL
THERMOSTAT