6. CYLINDER HEAD/VALVES K-PIPE 50 ROCKER ARM INSPECTION Measure the I.D. of each valve rocker arm. Service Limits: IN: 10. mm replace if over EX: 10. mm replace if over ROCKER ARM SHAFT INSPECTION Measure each rocker arm shaft O.D. Service Limits: IN: 9.78mm replace if below EX: 9.88mm replace if below VALVE SPRING INSPECTION Measure the free length of the inner and outer valve springs. Service Limits: Inner (IN, EX) : 32.41mm replace if below Outer (IN, EX): 35.25mm replace if below VALVE /VALVE GUIDE INSPECTION Inspect each valve for bending, burning, scratches or abnormal stem wear. Check valve movement in the guide. Measure each valve stem O.D. Service Limits: IN: 4.90mm replace if below EX: 4.90mm replace if below 6-7