Spark Plug - HYOSUNG RT 125 D Service Manual

2-7 PERIODIC MAINTENANCE

SPARK PLUG

Inspect Interval
Clean Initial 1,000 km and Every 4,000 km thereafter.
Replace Every 8,000 km.
● Disconnect the spark plug cap ① and remove the
spark plug.
TYPE SPARK PLUG SPECIFICATION
Hot type
Standard type
Cold type
■ ■ CARBON DEPOSITS
Check to see if there are carbon deposits on the
spark plug.
If carbon is deposited, remove it using a wire or pin
with a pointed end.
■ ■ SPARK PLUG GAP
Measure the spark plug gap using a thickness
gauge.
If the spark plug gap is out of specification, adjust the
gap.
Spark plug gap
0.7 ∼ 0.8 mm (0.028 ~ 0.032 in)
Thickness gauge : 09900-20806
■ ■ ELECTRODE
Check to see the worn or burnt condition of the elec-
trodes.
If it is extremly worn or burnt, replace the spark plug
with a new one.
And also replace the spark plug if it has a broken
insulator, damaged thread, etc.
CAUTION
To avoid damaging the cylinder head threads ;
first, finger tighten the spark plug, and then
tighten it to the specified torque using the spark
plug wrench.
CR7E
CR8E
CR9E
20
①
0.7 ~ 0.8 mm
(0.028 ~ 0.032 in)