1999-2004 Honda TRX400EX FourTrax Service Manual, Page 153Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT BALANCER Check the balancer gear for wear or damage
INSTALLATION
Apply oil to new crankshaft bearingDrive the crankshaft bearing into the left crankcase with the marking side facing up
TOOLS Driver Attachment, 72 75 mm Pilot30 mm