2006 Honda TRX680 Rincon Factory Service Manual, Page 182Get this manual
COOLING SYSTEM INSTALLATION Make sure the rubber seal on the thermostat is in good conditionInstall the thermostat into the housing, aligning the hole with the lug
Install the thermostat and tighten the two bolts securely
Insert the air intake duct against the connecting tube and secure it onto the heat guard with the trim clipTighten the band screw securelyFill and bleed the cooling system (page 7-6)Install the injector cover (page 6-48)Install the fuel tank covers (page 3-5)