2006 Honda TRX680 Rincon Factory Service Manual, Page 233Get this manual
CYLINDERPISTON Measure the piston pin hole I.DTake the maximum reading to determine the I.DSERVICE LIMIT: 23.03 mm (0.907 in) Measure the piston pin O.Dat three pointsSERVICE LIMIT: 22.98 mm (0.905 in) Calculate the piston-to-piston pin clearanceSERVICE LIMIT: 0.04 mm (0.002 in)
CONNECTING ROD
Measure the connecting rod small end I.DSERVICE LIMIT: 23.06 mm (0.908 in) Calculate the connecting rod-to-piston pin clearanceSERVICE LIMIT: 0.08 mm (0.003 in)
CAM CHAIN TENSIONER LIFTER