2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 246Get this manual
CLUTCHKICKSTARTERGEARSHIFT LINKAGE ('04'05) judder spring spring seat
Straighten the lock washer tabs
Hold the clutch center using the special tool and loosen the clutch center lock nutTOOL: Clutch center holder 07724-0050002 or 07724-0050001 or equivalent commercially available in U.S.A