kxct 125 Manuale-dofficina : Pagina 162

          6. CYLINDER HEAD/VALVES                                                                K-XCT 125i



 SERVICE INFORMATION
 GENERAL INSTRUCTIONS
  The cylinder head can be serviced with the engine installed in the frame. Coolant in the radiator
  and water jacket must be drained first.
  When assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable
  parts and valve arm sliding surfaces for initial lubrication.
  The valve rocker arms are lubricated by engine oil through the cylinder head engine oil passages.
  Clean and unclog the oil passages before assembling the cylinder head.
  After disassembly, clean the removed parts and dry them with compressed air before inspection.
  After removal, mark and arrange the removed parts in order. When assembling, install them in
  the reverse order of removal.


 SPECIFICATIONS                                                                           Unit: mm
                     Item                                            Standard
 Valve clearance (cold)            IN          0.1
                                   EX          0.1
 Cylinder head compression pressure            15kg/cm


 Cylinder head warpage                                                  
                                   IN          25.965
 Camshaft cam height               EX          25.810
                                   IN          10.0~10.015
 Valve rocker arm I.D.
                                   EX          10.0~10.015
 Valve rocker arm shaft            IN          9.972~9.987
 O.D.                              EX          9.972~9.987
                                   IN          4.975~4.970
 Valve stem O.D.
                                   EX          4.975~4.970
                                   IN          5.0~5.012
 Valve guide I.D.
                                   EX          5.0~5.012
 Valve stem-to-guide               IN          0.010~0.037
 clearance                         EX          0.030~0.057




 TORQUE VALUES
 Cylinder head cover bolt               0.8~0.9 kgf-m
 Tensioner mounting bolt                0.9 kgf-m
 Tensioner sealing bolt                 0.9 kgf-m


 Cylinder head cap nut                  2 kgf-m
                                                                 Apply engine oil to threads
 Cylinder head bolt                     0.7~1.1   kgf-m



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