2007-2009 Kawasaki KFX50 service manual, Page 126Get this manual
8CYLINDERPISTON Measure the piston pin O.DService Limit: 12.96 mm (0.5184 in)
Measure the piston-to-piston pin clearanceService Limit: 0.02 mm (0.0008 in)
Measure the piston O.DTake measurement at mm (0.4 in) from the bottom and 90 to the piston pin holeService Limit: 38.9 mm (1.556 in)