2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 106Get this manual
LUBRICATION SYSTEM ('04'05) Check the oil cooler hose joints and seams for leaksCheck the oil cooler air passage for clogging or damageStraighten bent fins using small flat blade screwdriver and remove insects, mud or other obstructions with compressed air or low pressure waterReplace the brake Install the removed parts in the reverse order of
hose clamp bolt removalTORQUE12 N
with new one