kpw 50 Workshop-manual : Page 60

          6. CYLINDER HEAD/VALVES                                                             K-PIPE 50

 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.
                 Item                      Standard (mm)
 Valve clearance (cold)      IN                 0.06
                             EX                 0.06
 Cylinder head compression pressure           15kg/cm
 Cylinder head warpage                           
 Camshaft cam height         IN                  
                             EX                  
 Valve rocker arm I.D.       IN                  
                             EX                  
 Valve rocker arm shaft      IN                  
 O.D.                        EX                  
 Valve stem O.D.             IN             4.924.970
                             EX             4.904.950
 Valve guide I.D.            IN                  
                             EX                  
 Valve stem-to-guide         IN                  
 clearance                   EX                  

 TORQUE VALUES
 Cylinder head cap nut           1.02.0kg-m
 Valve clearance adjusting nut   0.9kg-m
 Cylinder head cover nut         1.21.6kg-m

 SPECIAL TOOLS
 Valve spring compressor




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