2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 148Get this manual
CYLINDERPISTON Measure the piston pin hole 1.0Take the maximum read ing to determine th .0
SERVICE LIMIT: 20.060 mm (0.7898 in)
Measure the piston pin .0 at three points
SERVICE LIMIT: 19.964 mm (0.7860 in )
Calculate the piston-to -piston pin clearance
SERVICE LIMIT: 0.096 mm (0.0038 in )
CONNECTING ROD