2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 154Get this manual
CYLINDERPISTON The cylinder must be rebored so that the clearance for an oversize piston is 0.0150.045 mm (0.0006 0.0018 in)Check the top of the cylinder for warpage with straight edge and feeler gauge across the studs and bolt holes as shown
SERVICE LIMIT: 0.10 mm (0.004 in)
PISTONPISTON RING
Inspect the piston rings for movement by rot at ing the ri ngsThe rings shoul be ab le to move in th eir grooves without catchi ng Push the ring unti the outer su rface of the piston ring is near ly flush with the piston and measure the ring -to-ring groove clearance
SERVICE LIMIT: TopSecond: 0.90 mm (0.004 in)