2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 323Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER (After '05) Pilot, 20 mm 07746-0040500 Pilot, 25 mm 07746-0040600 Pilot, 30 mm 07746-0040700
Lock nut wrench, 20 24 mm 07716-0020100
Extension bar 07716-0020500