KYMCO Active 50 Service Manual page 66

6
. CYLINDER HEAD/VALVES
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
Measure each valve guide I.D.
ACTIVE 50