Hanway STM125 2019, Руководство по эксплуатации

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Inspection and Maintenance
29
Spark Plug
Use a small metal brush or cleaner to
remove the carbon deposits at the first
600miles (1000km) or every 1850miles
(3000km) lately. Readjust the spark plug gap
with a spark plug gap thickness gauge to
keep it 0.6~0.8mm. After every 3700miles
(6000km), the spark plug should be replaced.
Whenever remove the carbon deposits,
be sure to observe the color of the spark
plug’s porcelain tip. The color can tell you
whether or not the standard spark plug is
suitable for your type of usage. If the
standard spark plug is very black, you’d
better use a high-pressure hot type of spark
plug. A normal operating spark plug should be light brown or tan in color.
If the color is white or seem flashing, it is used in overheat condition and
change it with a cold type one.
Caution

Don’t tighten the spark strongly or make screw thread interlock. In
order not to damage the cylinder head, do not allow the contamination
to enter the engine through spark plug hole.

The standard spark plug for this motorcycle has been carefully
selected to meet the vast majority of all operation ranges. If the spark
plug color indicates that other than standard spark plug should be
used, it is best to consult the dealer before selecting an alternate plug
or heat range. The selection of an improper spark plug can lead to
severe engine damage.
Air Filter
The air filter element used in this motorcycle is a polyurethane foam
element. If the filter element has become clogged with dust, intake
resistance will increase with a resultant decrease in power output and
increase in fuel consumption due to the richer mixture. Check and clean the
air filter element according to the following procedure.
1. Remove the two screws.
2. Remove the two fixing slippers by sliding them rearward.
3. Remove the air filter cover.
4. Remove the filter element.