2000-2003 Honda TRX350 Rancher factory service manual, Page 111Get this manual
CYLINDER HEADVALVE VALVE SPRING Measure the valve spring free lengthSERVICE LIMITS: Inner: 36.94 mm (1.454 in) Outer: 40.42 mm (1.591 in)
VALVEVALVE GUIDE Check that the valve moves smoothly in the guideCheck the valve for bending, burning or abnormal wearMeasure each valve stem O.Dand record itSERVICE LIMITS: IN: 5.45 mm (0.215 in) EX: 5.43 mm (0.214 in)
Ream the valve guide to remove any carbon buildup before measuring the guideInsert the reamer from the combustion chamber side of the head and always rotate the reamer clockwiseTOOL: Valve guide reamer, 5.5 mm
07984-2000001 or 07984-200000D (U.S.Aonly)