2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 278Get this manual
CLUTCHSTARTER CLUTCHKICK STARTERGEARSHIFT LINKAGE (After '05) Remove the reduction gear shaft and reduction gear B
Temporarily install the clutch outer guide, needle bearing and clutch outer onto the mainshaftInstall the special tool between the primary drive and driven gears as shown, and loosen the primary drive gear boltTOOL: Gear holder, M2.5 07724-0010100 or 07724-001A100 (U.S.Aonly)
Remove the clutch outer, needle bearing and clutch outer guideRemove the primary drive gear bolt, washer and gearRemove the starter clutch assembly