SPARK PLUG
●
Remove the plug maintenance cover.
●
Remove the spark plug cap and disassemble the plug.
●
Check the plug for damage, contamination or deposits.
●
If the spark plugs are severely contaminated or
damaged, raplace with new ones. If the plugs can be
reused after removing only the carbon, use plug cleaner
and wire brush to clean the plugs.
●
Always use a feeler gauge to check the gap.
SPARK PLUG GAP : 0.6~0.7mm
•
Make sure there is no dirt or debris on the seat of the
spark plug hole before inserting the spark plug.
•
To prevent damage to the cylinder head, hand-tighten
the spark plug before using a wrench to tighten to the
specified torque.(torque : 14kgf
·
m)
•
Do not overtighten the spark plug.
CYLINDER COMPRESSION PRESSURE
●
Start and warm up the engine.
●
Remove the plug maintenance cover.
●
Stop engine, and remove the spark plug cap and spark
plug.
●
Install a compression gauge.
●
Open the throttle completely, and crank the engine with
the starter motor until the gauge reading rising.
•
The maximum reading is usually reached within 4~7
seconds.
COMPRESSION PRESSURE : 10kg/cm
2
(600rpm)
●
If the pressure is low, check the following:
-Leakage from the cylinder head gasket
-Piston/cylinder worn
●
If pressure is high, check the following:
-Carbon deposits on the piston head, and cylinder head.
TOOL : COMPRESSION GAUGE
2-5
INSPECTIONS/ADJUSTMENTS
PLUG MAINTENANCE COVER
SPARK PLUG CAP
COMPRESSION GAUGE
Summary of Contents for A-FOUR -
Page 1: ......
Page 44: ...4 2 LUBRICATION SYSTEM OIL SYSTEM DRAWING ...
Page 51: ...MEMO ...
Page 52: ...FUEL SYSTEM 5 0 FUEL GAUGE FUEL TANK FUEL AUTO COCK STRAINER CARBURETOR ...
Page 62: ...ENGINE REMOVAL INSTALLATION 6 0 ...
Page 97: ...MEMO ...
Page 128: ...BRAKE SYSTEM 12 0 ...
Page 140: ...MEMO ...
Page 150: ...MEMO ...
Page 158: ...MEMO ...
Page 166: ...MEMO ...
Page 174: ...MEMO ...
Page 175: ...17 1 17 WIRING DIAGRAM 17 ...
Page 176: ...MEMO ...
Page 184: ...MEMO ...
Page 185: ...SERVICE MANUAL 2005 6 PRINTED 2005 6 PUBLICATION NO COPY ...