1999-2004 Honda TRX400EX FourTrax Service Manual, Page 188Get this manual
REAR WHEELlSUSPENSlON Drive in new right bearing (brake disc side) squarely with the marking side facing up until it is fully seatedInstall the distance collarDrive in new left bearing squarely with the marking side facing up until it is fully seated
TOOLS Driver Attachment, 62 68 mm Pilot, 40 mm
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ATTACHMENTAND PILOT Clean the bearing holder outer surface and the swingarm inner surfaceCoat new O-rings with oil and install them into the grooves in the bearing holderApply grease to the bearing holder outer surfaceInstall the bearing holder into the swingarm until it is fully seated, being careful not to damage the O-rings