APRILIA RXV 450 UPGRADE BOOK, Use And Maintenance Book

Page: 93 / 198

MAINTENANCE
3 - 17
SXV / RXV 450 - 550
3.1.6. SPARK PLUG
Carefully read (MAINTENANCE).
NOTE Halve indicated maintenance intervals if the vehicle is
used in rainy or dusty areas, on uneven surfaces, or in
competitions.
WARNING
Check, clean or replace both spark plugs, one
by one.
Periodically remove the spark plugs and clean them
carefully, removing any carbon deposits; change them if
necessary.
WARNING
Always change both spark plugs together, even
when only one needs replacing.
In order to gain access to the spark plugs:
DANGER
Before carrying out the following operations, let
the engine and the silencer cool down until they
reach ambient temperature to avoid burns.
• Position the vehicle on the stand.
NOTE The vehicle fits one spark plug (2) per cylinder. The
information provided below applies to both spark plugs.
•
Remove the cap (1) of the spark plug (2).
• Remove any trace of dirt from the spark plug base (2).
•
Fit the wrench supplied with the tool kit into spark plug
(2) hexagonal flat
•
Unscrew the spark plug (2) and extract it from its seat,
taking care to prevent dust or other substances from
getting inside the cylinder.
For the check and cleaning:
WARNING
This vehicle is fitted with spark plugs with
platinum electrodes.
Do not clean the spark plugs with a wire brush
and/or abrasive products, use compressed air
only.
Key:
- center electrode (3);
- insulating (4);
- side electrode (5).
•
Make sure that there are neither carbon deposits, nor
corrosion marks on the electrodes and on the
insulating material of spark plug (2); if necessary, blow
with compressed air to clean them.
If the spark plug (2) has cracking on the insulating material,
corroded electrodes, excessive deposits or the tip (6) of the
central electrode is rounded, it must be changed.