2007 Arctic Cat DVX/Utility 250 ATV Service Manual, Page 49Get this manual
2Remove the valve seal, valve springs, and the lower remaining spring seatDiscard the valve sealNOTE: The valve seals must be replaced 3Invert the cylinder head and remove the valves
2Inspect the camshaft holder for cracks, distortion, or galling3Inspect the rocker arm shafts for blue discoloration or scoring4Inspect the rocker arms for excessive wear, loose adjusters, or scored camshaft followersMeasuring Valve Stem Outside Diameter
1Using micrometer, measure the valve stem outside diameter2Acceptable diameter range (intake valve) must be within specifications3Acceptable diameter range (exhaust valve) must be within specificationsMeasuring Valve FaceSeat Width