Spark Plugs - APRILIA RST mille Futura 2001 Service Manual

RST mille
USA

2.7 SPARK PLUGS

Carefully read 1.3.9 (PRECAUTIONS AND GENERAL
INFORMATION).
Check the spark plugs every 4687 mi (7500 Km) or every
8 months; replace them every 9375 mi (15000 Km) or
every 16 months.
Periodically remove the spark plugs, clean them to
remove any carbon deposits, and replace if necessary.
For competitive use, replace the spark plugs every 4687
mi (7500 Km) .
To access the spark plugs:
DANGER
Let the engine cool down to ambient temperature.
Raise the fuel tank, see 2.8 (LIFTING THE FUEL
TANK).
NOTE
The vehicle is equipped with two spark plugs
per cylinder.
The following steps refer to a single spark plug, but are
applicable to all.
To remove and clean:
DANGER
Never disconnect the spark plug cap while the
engine is running, as you could receive a powerful
electrical shock from the ignition system.
Remove the spark plug cap (1).
Remove all traces of dirt from the base of the spark
plug.
Place the special wrench supplied with the tool kit over
the spark plug.
Place the 13-mm open-end wrench supplied in the tool
kit over the hexagonal seat of the special spark plug
wrench.
Unscrew the spark plug and remove it from its seat,
being careful not to allow dust or other matter into the
cylinder.
WARNING
This vehicle is fitted with spark plugs featuring
platinum-type electrodes.
Never clean using metal brushes or abrasive
products, only a blast of compressed air.
- center electrode (3);
- insulation (4);
- side electrode (5).
Make sure that the spark plug electrodes and insulation
show no carbon deposits or signs of corrosion. If
necessary, clean using a blast of compressed air.
Replace the spark plug if the insulation is cracked, the
electrodes are corroded, or the plug shows excessive
deposits. If the center electrode (3) becomes rounded as
shown in the figure, replace the spark plug.
Always replace spark plugs with new ones of the same
standard.
Recommended spark plugs:
NGK R DCPR9E
Release 00/2002 - 03
SCHEDULED MAINTENANCE AND TUNING OPERATIONS
1
2
3
5
4
3
2
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