Engine; Cylinder Head Nuts And Exhaust Pipe Nuts; Cylinder Head And Cylinder; Spark Plug - HYOSUNG Prima Service Manual

CYLINDER HEAD NUTS AND EXHAUST
PIPE NUTS
NOTE:
Inspect Initial 1,000 km and Every 4,000 km.
CYLINDER HEAD NUTS
● Remove the personal trunk.
● Remove the spark plug cap.
● Remove the cylinder head cover bolt.
(Refer to page 3 - 5)
● Tighten the four nuts ① to the specified torque with a
torque wrench, when engine is cold.
Cylinder head nut : 8~12 N∙m ( 0.8~1.2 kg∙m )
EXHAUST PIPE NUTS
● Tighten the exhaust pipe nuts ② to the specified
torque.
Exhaust pipe nuts : 8~12 N∙m ( 0.8~1.2 kg∙m )

CYLINDER HEAD AND CYLINDER

NOTE:
Remove carbon Every 8,000km.
Carbon deposits in the combustion chamber and the
cylinder head will raise the compression ratio and may
cause preignition or overheating. Carbon deposited at
the exhaust port of the cylinder will prevent the flow of
exhaust gases, reducing the output. Remove carbon
deposits periodically.

SPARK PLUG

NOTE:
Inspect Initial 1,000km and Every 4,000km,
Replace every 8,000km.
Neglecting the spark pulg maintenance eventually leads to
difficult starting and poor performance. If the spark plug is
used for a long period, the electrode gradually burns away
and carbon builds up along the inside part. In accordance
with the Periodic Inspection Chart, the plug should be
removed for inspection, cleaning and to reset the gap.
● Carbon deposits on the spark plug will prevent good
sparking and cause misfiring. Clean the deposits off
periodically.
MAINTENANCE PROCEDURE 2-4
②
Carbon
①