super 9 3 Workshop-manual : Page 72

          6. CYLINDER HEAD/CYLINDER/PISTON                                               SUPER 9          50


 SERVICE INFORMATION
 GENERAL INSTRUCTIONS
 · The cylinder head, cylinder and piston can be serviced with the engine installed in the frame.
 · Before disassembly, clean the engine to prevent dust from entering the engine.
 · Remove all gasket material from the mating surfaces.
 · Do not use a driver to pry between the cylinder and cylinder head, cylinder and crankcase.
 · Do not damage the cylinder inside and the piston surface.
 · After disassembly, clean the removed parts before inspection. When assembling, apply the
   specified engine oil to movable parts.

 SPECIFICATIONS                                    Standard (mm)              Service Limit (mm)
                   Item                      SH10DA           SF10DA        SH10DA           SF10DA
 Cylinder head warpage                                                                0.10
 Piston O.D.(5mm from bottom of piston             38.97038.955                      38.90
 Cylinder-to- piston clearance                       0.030.07                         0.10
 Piston pin hole I.D.                              12.00212.008                      12.03
 Piston pin O.D.                                    11.99412.0                       11.98
 Piston-to-piston pin clearance                     0.0020.014                        0.03
 Piston ring end gap (top/second)                    0.100.25                         0.40
 Connecting rod small end I.D.                     17.00517.017                      17.03
 Cylinder bore                                      39.039.025                       39.05

 TORQUE VALUES
 Cylinder head bolt               14.716.66N-m
 Exhaust muffler joint lock nut   9.813.72N-m
 Exhaust muffler lock bolt        29.435.28N-m
 Spark plug                       10.7816.66N-m


 TROUBLESHOOTING
 Compression too low, hard starting
 or poor performance at low speed                     Abnormal noisy piston
 · Leaking cylinder head gasket                       · Worn cylinder and piston
 · Loose spark plug                                   · Worn piston pin or piston pin hole
 · Worn, stuck or broken piston and piston rings      · Worn connecting rod small end bearing
 · Worn or damaged cylinder and piston
 Compression too high, overheating
 or knocking                                          Abnormal noisy piston rings
 · Excessive carbon build-up in cylinder head         · Worn, stuck or broken piston rings
   or on piston head                                  · Worn or damaged cylinder



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