Generic XOR 50 ccm, Service Manual

Page: 11 / 110

11
SPARK PLUG
Neglecting the spark plug maintenance eventually leads to difficult starting and poor
performance. If the spark plug is used for a long time, the electrode gradually burns
away and carbon builds up along the inside part. In accordance with the periodic
table, the plug should be removed for inspection, cleaning and to reset the gap.
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Carbon deposits on the spark plug will prevent
good sparking and cause misfiring. Clean the
deposits periodically.
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If the center electrode is fairly worn down, the
plug should be replaced and the plug gap set to
the specified gap using a thickness gauge.
Thickness gauge
Spark plug gap
：
0.6-0.7 mm (0.024-0.028 inch)
Check the spark plug for burnt condition. If
abnormal replace the spark plug as indicated in the
chart.
NGK TROCH REMARKS
BPR7HS E8RTC If the standard plug is apt to get wet, replace with the plug.
BPR8HS E7RTC Standard
BPR9HS E6RTC
If the standard plug is apt to overheat, replace with the
plug.
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Tighten the spark plug to the specified torque.
Spark plug
Tightening torque:15-18N.m
NOTE:
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To check the spark plug, first make sure that the fuel used is unleaded gasoline,
and if plug is either sooty with carbon or burnt white, replace it.
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Confirm the thread size and reach when replacing the plug.
FUEL LINE
Inspect at initially 500 km and every service,
replace every 4 years.