Spark Plug - Malaguti Phantom F12R User Manual

5.7 SPARK PLUG

Replace every 3,800 mi (6,000 km)
Recommended spark plugs:
(liquid-cooled vehicle):
(air-cooled vehicle):
The spark plug is an essential component:
• Proper care of the plug is important for maintaining
the engine in perfect working order.
• For maintenance, remove the left hand protective
cover (P-Fig.23
and remove cap (T-Fig.23) by turning it alternately
clockwise and anti-clockwise. Now, unscrew the
spark plug using the special wrench supplied with
the vehicle (all operations on the spark plug must be
performed when the engine is cold).
• Examine the spark
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 rating of
the spark plug, carburetion, lubrication and general
conditions of the engine. A light brown colour of the
insulator, around the central electrode, indicates
good working order.
• After disassembling the spark plug, suitably clean
the electrodes and the insulator using a metal brush.
gap should range from 0.6 to 0.7 mm.
NGK BR8 HS
NGK BR7 ES
plug conditions after
• Blow onto it so as to prevent possible residues from
wrench, wrench it but not too hard.
Spark plugs with a heat rating differing from the
recommended one may seriously damage the
engine.
It is imperative that any spark plug exhibiting
cracks on the insulator or corroded electrodes
be replaced.
a
P
T
1
2
3
4
5
6
ENG
Fig.23
37