Checking The Spark Plugs - Benelli TRK 502 Bedienungsanleitung

Checking the spark plugs

The spark plugs are important engine compo-
nents, which should be checked periodically,
preferably by a Benelli dealer.
Since heat and deposits will cause any spark
plug to slowly erode, they should be removed
and checked in accordance with the periodic
maintenance and lubrication chart. In addi-
tion, the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the center
electrode of each spark plug should be a me-
dium-to-light tan (the ideal color when the
vehicle is ridden normally), and all spark plugs
installed in the engine should have the same
color. If any spark plug shows a distinctly dif-
ferent color, the engine could be operating
improperly.
Do not attempt to diagnose such problems
yourself. Instead, have a Benelli dealer check
the vehicle.
If a spark plug shows signs of electrode ero-
sion and excessive carbon or other deposits, it
should be replaced.
Specified spark plug:
NGK CR8E
Before installing a spark plug, the spark plug
gap should be measured with a wire thickness
gauge and, if necessary, adjusted to specifica-
tion.
Spark plug gap:
0.7~0.8 mm (0.027~0.031 in)
Clean the surface of the spark plug gasket and
its mating surface, and then wipe off any gri-
me from the spark plug threads.
Tightening torque:
15 N·m (1.5 kgf·m, 11 lb·ft)
6 - 9
Periodic maintenance and adjustment
TIP
If a torque wrench is not available when in-
stalling a spark plug, a good estimate of the
correct torque is 1/4–1/2 turn past finger ti-
ght.
However, the spark plug should be tightened
to the specified torque as soon as possible.
1. Spark plug gap
EN
6