1999-2004 Suzuki King Quad LT-300 300F ATV Factory Service Manual, Page 78Get this manual
PISTON PIN AND PIN BORE Measure the piston pin outside diameter using ta micrometer and the piston pin bore inside diameter using the small bore gaugeIf either is out of specification or if the difference between the measurements is more than their service limits, replace the piston
,fcmh 09900-20602: Dial gauge (111000 mm)
09900-22401: Small bore gauge (10-18 mm)
Service Limit Piston pin bore 1.0 17.030 mm (0.6705 in) Measure the piston pin outside diameter at three positions using the micrometerIf any of the measurements are out of specification, replace the piston pin
09900-20205: Micrometer (0-25 mm)
Service Limit Piston pin .0 16.980 mm (0.6685 in)