2004-2005 Honda TRX450R Factory Sevice Manual, Page 117Get this manual
COOLING SYSTEM ASSEMBLY Install the fan otor he shro ud in th directi on as shown and tigh te he three bolts securely
Install the cooling fan on he fan motor shaft, aligning the flat surfaces Apply locking agent to the motor nut hreadsInstall the nut and tighten it
Install he shro udmoto assembly onto he radi ator and ti ghten th th ree wa sher- bolts securelyRoute th an mot or ire and breather hose through he clamp as shown