2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 487Get this manual
ELECTRIC STARTER (TRX450ER) Record the location and number of shims-
front cover washer insulated washer shims seal ring
SEAL RING
FRONT COVER
SHIM(S) Check the dust seal and needle bearing for wear of damageReplace the front cover if necessary