2006 Honda TRX680 Rincon Factory Service Manual, Page 352Get this manual
DRIVETRAIN SYSTEM Install the wave spring into the piston grooveCoat the clutch discs with clean engine oilInstall the three clutch plates and discs alternately, starting with the plateWAVE SPRING
Install the end plate with the stepped side facing outInstall the stopper ring into the drum grooves properlyPerform the initial clearance inspection (page 1470)
STOPPER RING