4. Check that the porcelain insulator (3) around
the center electrode of the spark plug is a
medium-to-light tan (the ideal color when the
vehicle is ridden normally).
5. Check the spark plug electrode for corrosion
(4) and excessive carbon or other deposits, and
replace it if necessary.
CAUTION
If the spark plug shows a distinctly different
color, the engine could be operating improperly.
Do not attempt to diagnose such problems
yourself. Instead, have a dealer check the
vehicle.
WARNING
Please note that no other spark plug model is
allowed. Using a different spark plug model can
immediately lead to engine damage.
6. Measure the spark plug gap with a wire
thickness gauge and, if necessary, adjust the
gap to specification. Clean the surface of the
spark plug gasket and its mating surface, and
then wipe off any grime from the spark plug
threads.
7. Install the spark plug with the spark plug
wrench, and then tighten it to the specified
torque.
WARNING
Please note the max. torque when inserting the
plug. If you do not have the ability to control you
leave control of the spark plug to the dealer.
Spark plug gap: 0,6 - 0,7 mm
Specified spark plug: NGK-CR7HSA
Tightening torque: 12Nm
34
USER’S MANUAL
UM MOTORCYCLES CHILL EURO V 50 - 125
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