movie 125 euro 3 Workshop-manual : Page 44

          3. INSPECTION/ADJUSTMENT                                            MOVIE SYSTEM

                                                          Timing Hole Cap
 IGNITION TIMING
 The CDI unit is not adjustable. If the
   ignition timing is incorrect, check the
   ignition system.

 Remove the rear right side cover.
 Remove the timing hole cap.




 Check the ignition timing with a timing
 light.                                             Timing Light
 When the engine is running at idle speed,
 the ignition timing is correct if the "F" mark
 on the flywheel aligns with the index mark
 on the crankcase.




 Also use a timing light to check the advance.
 Raise the engine speed to 5,000rpm and the
 index mark on the crankcase should be            Advance Mark
 aligned with the advance mark on the
 flywheel.


 CYLINDER COMPRESSION
 Warm up the engine before compression
 test.
 Remove the met-in box and frame center
 cover.
 Remove the spark plug .
 Insert a compression gauge.
 Open the throttle valve fully and push the        "F" Mark
 starter button to test the compression.
                                                                      Compression Gauge
 Compression: 13kg/cm
 If the compression is low, check for the
 following:
 - Leaky valves
 - Valve clearance to small
 - Leaking cylinder head gasket
 - Worn piston rings
 - Worn piston/cylinder
 If the compression is high, it indicates that
 carbon deposits have accumulated on the
 combustion chamber and the piston head.

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