Cylinder Pressure Inspection - KSR Moto T58 - ZION 125 Repair Manual

CYLINDER PRESSURE INSPECTION

The pressure inspection should be made when the engine is warm.
1.
2. Remove the spark plug from the engine.
3. Install cylinder pressure meter (1) in the spark plug hole.
4. Pull full throttle and press "Start" to run the engine.
5. Measure the cylinder pressure.
Cylinder pressure: 12.5 bar (+/-0,5 bar)/ 1500 rpm
1. Check the following items if the compression pressure is too
low.
• If the cylinder head gasket is damaged
• The wear or damage of piston ring
• The wear of piston and cylinder
2. Check the following items if the compression pressure is too
high.
• Combustion chamber and the carbon deposition on the
top of the piston.
SPARK PLUG
1. Open the drop door to reach the spark plug
2. Remove the spark plug cap .
3. Use a spark plug circular wrench to remove the
4. Check the over burning, pollution and carbon deposit of spark
plug.
5. If the spark plug do not comply replace it.
Recommended spark plug type:
WARNING
!
When you need to replace the spark plug always control the in-
stalled type in before the replacement. It could be possible that
based on technical innovations the type which is described will
change.
Spark plug gap clearance X: 0.6-0.7 mm
Spark plug images and analysis
See page 23.
TORCH: A7RTC
spark plug.
ENGINE
1
X
49