2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 497Get this manual
REAR DRIVING MECHANISM Install the shim and bAtHing ont the pinion ear NOTE: When the gear setring gear bear ing, andor gear case has been replaced, use 2.00 mm (0.79 inl thick shim tor initial reference
PIN ION GEAR
Press the pinion gear in the bearing un it it is seat ed by supporting the bearing with the special toolTOOL:
Attachm nt25 mm .0
01146-0030200
CASE BEARING REPLACEMENT