dinkstreet 125 Manuel atelier : Page 83

Microfiches
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          6. CYLINDER HEAD/VALVES                                          DOWNTOWN 125i


 INSPECTION

 Remove carbon deposits from the exhaust                Combustion Chamber
 port and combustion chamber.
 Be careful not to damage the cylinder
   head mating surface.




                                                  Exhaust Port
 Valve /Valve guide

 Inspect each valve for bending, burning,
 scratches or abnormal stem wear.
 If any defects are found, replace the valve
 with a new one.


 Service limits:
                     IN: 0.08 mm
                    EX: 0.1 mm
 If the stem-to-guide clearance exceeds
   the service limits, replace the cylinder
   head is necessary.




 Valve spring

 Measure the free length of the inner and outer
 valve springs.




                                                                             6-12