2003 Suzuki LT-Z400 Factory Service Manual, Page 130Get this manual
COOLING AND
Drain small amount of engine coolantPlace under the thermostat caSR Remove the thermostat case, Remove tile 4)
the thermostat signs of Test the thermostat at the bench for control in the followmanneL Immerse the in the water contained in as shov,In in the illustrationNote that the immersed thermostat is in the beaker on stOVE and observe the "' Read the thermometer which is the stat valve to open, should Thermostat valve the thermostat This level at which the thermothe standard value,