Spark Plug - Remplace 29 1 2 3 - Malaguti SPIDER MAX RS 500 Service Manual

SPARK PLUG
every 10.000 km
REMPLACE
The spark plug is an essential component: NGK CR7EKB
Spark plugs with a heat degree different from the
recommended one may seriously damage the engine.
• The SpiderMax engine features an ignition system with a double spark
plug (C).
• For maintenance, remove the side partition (P), carefully remove the
cap by turning it clockwise and anticlockwise alternatively. Now, unscrew
the spark plug using the special wrench supplied with the vehicle.
Remove the spark plug when the engine is cold.
• Examine the spark plug conditions after a reasonably long drive (10-15
km) and after letting the engine cool down (at least 10-15 minutes),
since the sediments and the colour of the insulator can provide useful
information about the heat degree of the spark plug, carburetion,
lubrication and general conditions of the engine. If the insulator is
light brown around the central electrode, it indicates good working
order.
• Black, dry (to touch), sooty and tarnished deposits show that the
functioning temperature is too low (the heat rating of the spark plug is
too high), carburetion too rich or faulty ignition.
• Whitish insulating material shows an "extremely light" mixture or the heat rating of the spark plug too low (spark plug
too "hot").
Check and clean every 6.000 km.
• After disassembling the spark plug, carefully clean the electrodes and the insulating material, using a metal brush. Adjust
the distance between the electrodes (operating only on the ground electrode), using a gauged shim: the distance should be
0.7 : 0.9 mm.
• Blow out energetically, to prevent possible residues from entering the engine and refit it by tightening it by hand all the way
in; then, tighten it to the prescribed torque.
F. 33
29 02/08
12 ÷ 14
F. 33/a