Spark Plug - HYOSUNG Aquila 250 Service Manual

2-5 PERIODIC MAINTENANCE
● Rotate the magneto rotor to set the rear cylinder' s
piston at TDC(Top Dead Center) of the compression
stroke.
(Rotate the rotor 285�counter-clockwise from the
｜
" F"line, and until the "
aligned with the center of hole on the crankcase.)
● Inspect the rear cylinder' s valve clearance with the
same manner of the front cylinder.

SPARK PLUG

NOTE:
Clean Initial 1,000 km and Every 4,000 km,
Replace Every 8,000 km.
● Disconnect the spark plug caps.
● Remove the spark plugs.
TYPE
SPARK PLUG SPECIFICATION
Hot type
Standard type
Cold type
Remove the carbon deposite with wire or pin and adjust
the spark plug gap to 0.7�0.8 mm, measuring with a
thickness gauge.
Spark plug gap
Thickness gauge : 09900 - 20806
Check to see the worn or burnt condition of the elec-
trodes.
If it is extremly worn or burnt, replace the plug.
And also replace the plug if it has a broken insulator,
damaged thread, etc.
● Install the spark plug, and then tighten it to specified
torque.
Spatk plug : 20~25 N∙m (2.0~2.5 kg∙m)
｜
R"line on the rotor is
CR7E
CR8E
CR9E
0.7�0.8 mm
0.7~0.8 mm