Malaguti Phantom F12R, User Manual

Page: 139 / 254

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Fig.23
P
T
ENG
5.7 SPARK PLUG
Replace every 3,800 mi (6,000 km)
Recommended spark plugs:
(liquid-cooled vehicle): NGK BR8 HS
(air-cooled vehicle): NGK BR7 ES
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
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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 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 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.
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gap should range from 0.6 to 0.7 mm.
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Blow onto it so as to prevent possible residues from
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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.
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