2008-2010 Kawasaki KFX450R Factory Service Manual, Page 160Get this manual
COOLING SYSTEM 4-17 Radiator
Radiator Inspection
Check the radiator coreto air flow, remove the radiator If there are obstructions
and remove obstructionsIf the corrugated fins [A] are deformed, carefully straighten themIf the air passages of the radiator core are blocked more than 20 by unremovable obstructions or irreparably deformed fins, replace the radiator with new one
Radiator Cleaning
Refer to the Radiator Cleaning in the Periodic Maintenance chapterRadiator Cap Inspection