APRILIA 854239, Service Station Manual

Page: 27 / 216

Number of races Every
race
Every 3
races
Every 6
races
Every 9
races
Every 18
races
Fuel pipes I
Exhaust pipe / silencer (remark 6) I
Camshaft wear I
Break pad wear I
Cotter, valve and bucket tappet wear I
Oil pressure regulator valve I
Spark plug
At regular intervals, remove the spark plug and clean off any carbon deposits or replace as required.
CAUTION
ALWAYS REPLACE BOTH SPARK PLUGS EVEN IF ONLY ONE NEEDS REPLACING.
In order to reach the spark plugs:
CAUTION
BEFORE CARRYING OUT THE FOLLOWING OPERATIONS AND IN ORDER TO AVOID BURNS,
LEAVE ENGINE AND SILENCER TO COOL OFF TO AMBIENT TEMPERATURE.
•
Remove the tube (1) of the spark plug
(2).
•
Clean off any trace of dirt from the
spark plug (2) base.
•
Insert the spanner supplied in the tool
kit into the hexagonal head of the spark
plug (2).
•
Unscrew the spark plug (2) and re-
move it from its seat, making sure no
dust or dirt gets into the cylinder.
Checking and cleaning:
CAUTION
THE ELECTRODES OF THE SPARK PLUGS INSTALLED
ON THIS VEHICLE ARE PLATINUM ELECTRODES. DO
NOT USE METAL BRUSHES AND/OR ABRASIVE PROD-
UCTS TO CLEAN THE SPARK PLUGS. USE ONLY A COM-
PRESSED AIR JET.
MXV 450
Maintenance
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