2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 204Get this manual
CYLINDER HEADVALVE Remove the tensioner lifter sealing bolt and washer
'04- '05: Turn the cam chain tensioner lifter shaft clockwise fully and secure it with the special tool to loosen the tensioner lifterTOOL: Cam chain tensioner holder 07ZMG-MCAA400 or 07AMG-001A100 (U.S.A only)