2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 211Get this manual
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CYLINDER HEADIVAlVECAMSHAFT M easu re each follower bo re I.DSERVICE LIMIT: 22.54 mm (0.887 in)
Remove the fo llowingther mostat (p age 7-8) throttle body (page 6-43) exhaust pipe (page 3-191 cy