If the valve is open, replace the thermostat with a new one.

The thermostat must be completely submerged and must not touch the container sides or bottom. Suspend an accurate thermometer [B] in the water so that the heat sensitive portions [C] are located in almost the same depth.
It must not touch the container, either.
If the measurement is out of the specified range, replace the thermostat with a new one.
Thermostat Valve Opening Temperature
58
62°C (136
144°F)

Thermostat Installation
Hoses and PipesCoolant Filling
Remove the bolts and quick rivets.
Detach the tabs and remove the right
fairing and cover.
A. Bolts
B. Quick Rivet
C. Large Quick Rivet
D. Tabs
E. Right Fairing and Cover
NOTE
The right fairing and cover uses the
quick rivets and large quick rivet.
The large quick rivet ca ...
Sidestand Switch Operation Inspection
Raise the rear wheel off the ground with the stand (see
Rear Wheel Removal in the Wheels/Tires chapter).
Inspect the sidestand switch [A] operation accordance to
below table.
Sidestand Switch Operation
If the sidestand switch operation does not work, inspect
or replace the foll ...
Rear Wheel Rotation Sensor Wiring Inspection (Service Code b 45)
Disconnect the rear wheel rotation sensor lead connector
[A] (see Rear Wheel Rotation Sensor Removal in the
Brakes chapter).
Disconnect the KIBS hydraulic unit lead connector (see
KIBS Hydraulic Unit Removal in the Brakes chapter).
Check the wiring continuity of the G lead and R ...