Spark Plug - VESPA GTV 125 Service Station Manual

Vespa GTV 125

Spark plug

- Rest the scooter on its stand
- Open the saddle and take out the helmet com-
partment
- Disconnect spark plug HV wire hood;
- Unscrew the spark plug using the wrench sup-
plied;
- Check the conditions of the spark plug, make
sure the insulation is intact, that the electrodes are
not excessively worn or grimy, the conditions of the
washer, and measure the distance between the
electrodes using the appropriate feeler gauge.
-Adjust the distance if necessary by bending the
side electrode very carefully. In case of anomaly
(as described before) replace the spark plug with
another of the recommended type;
- Fit the spark plug with the correct inclination and
manually screw it all the way down, then use the
special spanner to tighten it.
- Insert the cap onto the spark plug and proceed
with the reassembly operations.
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
Spark plug
Champion RG 4 HC
Electrode gap
0.7-0.8 mm
Locking torques (N*m)
Spark plug 12 ÷ 14
Hub oil
Maintenance
MAIN - 9