2001 Arctic Cat ATVs factory service and repair manual, Page 211Get this manual
Fig3-775
Measuring Valve FaceSeat Width
1Using micrometer, measure the width of the valve faceFig3-777
NOTE: The valve seals must be replaced
3Remove the valve springs; then invert the cylinder head and remove the valvesMeasuring Valve Stem Runout
ATV1004
2Acceptable width range is 0.9-1.1 mm (0.035-0.043 inMeasuring Valve Face Radial Runout