Spark Plug - PIAGGIO 633929(IT) Service Station Manual

Maintenance

Spark plug

To service the spark plug the engine must be cold,
proceed as follows:
- Undo the knob located inside the rear case and
remove the saddle.
- Remove the spark plug cap.
- Use the supplied spanner (with retaining rubber
ring) to remove the spark plug.
- Disconnect and remove the spark plug cable.
- Examine it carefully and replace it if the insulator
is chipped or cracked.
- Measure electrode gap with a thickness gauge
and, if necessary, adjust the gap by carefully bend-
ing the outer electrode forward or away.
- Make sure the sealing washer is in good condi-
tion.
- Fit the spark plug, screw it manually and lock it
to the prescribed torque with a spark plug spanner.
CAUTION
THE SPARK PLUG MUST BE REMOVED WHEN
THE MOTOR IS COLD. THE SPARK PLUG
MUST BE REPLACED EVERY 12,000 KM. THE
USE OF NON CONFORMING IGNITION CON-
TROL UNITS OR SPARK PLUGS OTHER THAN
THOSE PRESCRIBED CAN SERIOUSLY DAM-
AGE THE ENGINE.
Characteristic
Electrode gap
0.7-0.8 mm
Electric characteristic
MAIN - 8
MP3 125