stryker 125 Manuel atelier : Page 85

          6. CYLINDER HEAD/VALVES                                                     STRYKER 125/150
 After lapping, wash all residuals off the
 cylinder head and valves.
 · When lapping, use a light pressure and                Contact too Low
      avoid damaging the valve seat due to
      forcedly lapping.
    · Use care not to allow emery powder to                                        Old Seat Width
      enter the valve stem and guide.
 After refacing and lapping, apply red lead
 to the 45° valve seat to make sure that the
 center of the valve contact face is even.




 CYLINDER HEAD ASSEMBLY                           Stem Seal
 Lubricate each valve stem with engine oil
 and insert the valves into the valve guides.
 Apply engine oil to the valve stem seals and
 install them into the valve guides.
 Be sure to install new valve stem seals.



                                                  Valve Stem


 Install the valve spring seats, washers, inner
 and outer springs, and retainers.                Valve Spring Compressor
 Compress the valve springs using the valve
 spring compressor, then install the valve
 cotters.
 · Use the valve spring compressor to
      compress the springs and do not
      damage the cylinder head surface.
    · Install the cotters with the pointed ends
      facing down.

  Special
 Valve Spring Compressor
 Valve Spring Compressor Attachment               Valve Spring Compressor Attachment




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