agility city 125 Workshop-manual : Page 75

          7. CYLINDER HEAD/VALVES                                                      AGILITY CITY 125

 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                      0.12                     
 Valve clearance (cold)
                             EX                      0.12                     
 Cylinder head compression pressure                13kg/cm
 Cylinder head warpage                                
                             IN                     29.803                  29.40
 Camshaft cam height
                             EX                     29.5637                 29.16
 Valve rocker arm I.D.       IN                 10.00010.015                10.10
                             EX                 10.00010.015                10.10
 Valve rocker arm shaft      IN                  9.9729.987                  9.91
 O.D.                        EX                  9.9729.987                  9.91
 Valve seat width            IN                       1.0                    1.8
                             EX                       1.0                     1.8
 Valve stem O.D.             IN                  4.9754.990                  4.90
                             EX                  4.9554.970                  4.90
 Valve guide I.D.            IN                  5.0005.012                  5.03
                             EX                  5.0005.012                  5.03
 Valve stem-to-guide         IN                  0.0100.037                  0.08
 clearance                   EX                  0.0300.057                  0.10




7-1