1999-2004 Suzuki King Quad LT-300 300F ATV Factory Service Manual, Page 67Get this manual
Remove the valve spring retainer and valve springs Remove the valve from the other side
Remove the oil seal with long-nose pliers Remove the valve spring seatNOTE: Removal of valves completes ordinary disassembling workIf valve guides have to be removed for replacement after inspecting the related parts, carry out the steps shown in the valve guide servicing
CYLINDER HEAD DISTORTION Decarbonize the combustion chamberCheck the gasket surface of the cylinder head for distortionUse straightedge and thickness gaugeTake clearance readings at several placesIf readings exceed the service limit, replace the cylinder head
,40011 09900-20803: Thickness gauge
Service Limit Cylinder head distortion: 0.05 mm (0.002 in) VALVE STEM RUNOUT Support the valve using V-blocks, as shown, and check its runout using the dial gaugeIf the runout exceeds the service limit, replace the valve