2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 194Get this manual
CYLINDERPISTON Insert each piston ring into the bottom of the cylinder squarely using the pistonMeasure the ring end gapSERVICE LIMITS: Top: 0.5 mm (0.02 in) Second:0.6 mm (0.02 in)
Measure the piston pin O.D90 to the piston pin hole and at point 15 mm (0.6 in) from bottom of the piston skirtSERVICE LIMIT: 91.90 mm (3.618 in) Compare this measurement against the maximum cylinder I.Dmeasurement and calculate the pistonto-cylinder clearance (page 9-7)