agility 50 3 Manuel atelier : Page 76

          7. CYLINDER HEAD/VALVES                                                        FILLY LX 50

 SERVICE INFORMATION...................... 7-1      CYLINDER HEAD DISASSEMBLY.......7-7
 TROUBLESHOOTING ............................ 7-2   CYLINDER HEAD ASSEMBLY .............7-8
 CAMSHAFT REMOVAL......................... 7-3      CYLINDER HEAD INSTALLATION .....7-8
 CYLINDER HEAD REMOVAL .............. 7-5           CAMSHAFT INSTALLATION................7-9


 SERVICE INFORMATION
 GENERAL INSTRUCTIONS
 · The cylinder head can be serviced with the engine installed in the frame.
 · When assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable
   parts, valve arm and camshaft sliding surfaces for initial lubrication.
 · The camshaft is 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

                Item                        Standard (mm)             Service Limit (mm)
                          IN                     0.04                         
  Valve clearance (cold)
                          EX                      0.04                        
 Cylinder head compression                    14kg/cm2                        
 Cylinder head warpage                                                       0.05
                          IN                    26.438                      26.038
 Camshaft cam height
                          EX                    25.807                      25.407
 Valve rocker arm I.D.    IN                10.000-10.015                   10.10
                          EX                10.000-10.015                   10.10
 Valve rocker arm shaft   IN                 9.972-9.987                     9.91
 O.D.                     EX                 9.972-9.987                     9.91
 Valve seat width         IN                      1.0                         1.8
                          EX                       1.0                        1.8
  Valve stem O.D.         IN                 4.975-4.990                      4.9
                          EX                 4.955-4.970                      4.9
                          IN                 5.000-5.012                     5.03
  Valve guide I.D.
                          EX                 5.000-5.012                     5.03
 Valve stem-to-guide      IN                 0.010-0.037                     0.08
 clearance                EX                 0.030-0.057                      0.1
                         Inner                    31.1                       30.1
 Valve spring free
 l    h                  Outer                   34.35                       33.3




7-1