2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 168Get this manual
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COOLING SYSTEM TOOLS Driver 07749-0010000 Attachment, 28 30 mm 07946-1870100 Pilot, 12 mm 07746-0040200
or 07936-166010A and 079363710100 (U.S.Aonly)
or 07936-371020A or 07936-37102