2007-2010 Honda FourTrax Rancher 420 TRX420 TRX Service Manual, Page 249Get this manual

2007-2010 Honda FourTrax Rancher 420 TRX420 TRX Service Manual, Page 249

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CYLINDERPISTON PISTON PISTON RING

Compare this measurement against the maximum cylinder measurement and calculate the piston .0tocylinder clearance (page 105)
Measure piston pin hol