2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 272Get this manual
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CRANKCASECRANKSHAFTBALANCER Pilot, 40 mm 07746-0040900
Threaded adaptor
07965VM00300
Attachment, 78 90 mm 07',3ADSD40101
or 07931-KF00200 (U.S.Aonly