APRILIA SHIVER 900 Service Station Manual page 68

Maintenance
•
Remove the ignition coils.
•
Remove the spark plugs using a spe-
cial key.
•
Check the distance between the elec-
trodes using a thread thickness gauge.
CAUTION
DO NOT ATTEMPT IN ANY WAY TO CHANGE THE DIS-
TANCE BETWEEN THE ELECTRODES.
Characteristic
Spark plug electrode gap
0.6 ÷ 0.7 mm (0.024 ÷ 0.028 in)
If the distance between the electrodes is different, replace the spark plug.
•
Make sure the washer is in good conditions.
For installation:
•
With the washer mounted, manually screw the spark plug completely with caution to avoid
damaging the thread.
•
With a suitable key, tighten by performing a 1/2 turn to each spark plug to compress the
washer.
•
Loosen and tighten again the spark plug to the specified torque.
CAUTION
TIGHTEN THE SPARK PLUG CORRECTLY. OTHERWISE, THE ENGINE MAY OVERHEAT AND
GET IRRETRIEVABLE DAMAGED.
USE ONLY THE RECOMMENDED TYPE OF SPARK PLUG, OTHERWISE, ENGINE DURATION
AND PERFORMANCE COULD BE COMPROMISED.
If the distance between the electrodes is different, replace the spark plug.
•
Make sure the washer is in good conditions.
For installation:
•
With the washer mounted, manually screw the spark plug completely with caution to avoid
damaging the thread.
•
With a suitable key, tighten by performing a 1/2 turn to each spark plug to compress the
washer.
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SHIVER 900