2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 115Get this manual
CYLINDER HEADVALVES Check the cylinder head diagonally two ways for warpage wit straight edge Bnd feeler gauge
SERVICE LIMIT; 0.10 mm )0.004 inJ
VALVE SPRING INSPECTION
Measure Ihe free length of Ihe inner and ou ter valve springs
SERVICE LIMITS: INNER: 37.8 mm 11 .49 inJ OUTER: 39.8 mm 11 .57 inJ
VALVE INSPECTION
Inspect each valve for truenessburning, scratches or abnormal stem wearCheck Ihe valve movement In the guideMeasure end record each valve stem 0.0 SERVICE LIMITS: INTAKE: 5.45 mm )0.215 in) EXHAUST: 5.43 mm )0.214 inJ