kpw 50 Workshop-manual : Page 64

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          6. CYLINDER HEAD/VALVES                                             K-PIPE 50
 Remove carbon deposits from the combustion
 chamber.
 Clean any gasket material from the cylinder
 head mating surface.
 Be careful not to damage the cylinder
   head mating surface and valve seat.




 CYLINDER HEAD INSPECTION
 Check the spark plug hole and valve areas for
 cracks.
 Check the cylinder head for warpage with a
 straight edge and feeler gauge.
 Service Limit: 0.05mm repair or replace if
 over




 CAMSHAFT INSPECTION
 Check each camshaft bearing for play or
 damage. Replace the camshaft assembly with
 a new one if the bearings are noisy or have
 excessive play.




                                                 Camshaft Bearing


 Check each cam lobe for wear or damage.
 Measure the cam lobe height.
 Service Limits:
             IN: 25.8mm replace if below
             EX:25.6mm replace if below




                                                                         6-6