1997 Yamaha YFM600FWAK ATV Service Manual, Page 138Get this manual
CYLINDER AND PISTON
PISTON RING INSPECTION 1.Measure: Ring side clearance Use feeler gauge CDOut of specification 7 Replace the piston and rings as setNOTE: Clean carbon from the piston ring grooves and rings before measuring the side clearanceSide clearance Standard Top ring 2nd ring 0.040.08 mm (0.0020.003 in) 0.030.07 mm (0.0010.003 in) Limit 0.13mm (0.005 in) 0.13 mm (0.005 in)
2.Position: Piston ring (in cylinder) NOTE: _
Insert ring into the cylinder and push it approximately 40 mm (1.6 in) into the cylinderPush the ring with the piston crown so that the ring will be at right angle to the cylinder bore307027