2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 230Get this manual
Engine Cooling System: Installation 1) Apply engine coolant to the rubber seal on the thermostat (1)2) Install the thermostat (1) 1F-11
4) Immerse the thermostat (1) in the water contained in beaker and note that the immersed thermostat is in suspension5) Heat the water by placing the beaker on stove and observe the rising temperature on thermometer (2)
I933H1160028-01
3) Install the thermostat case4) Pour engine coolant and bleed air from the cooling circuitRefer to "Cooling System Inspection in Section 0B (Page 0B-13)"
I705H1160030-03
"A": String
Thermostat Inspection
Inspect the thermostat in the following procedures: 1) Remove the thermostatRefer to "Thermostat Removal and Installation (Page 1F-10)"2) Inspect the thermostat pellet for signs of cracking