Jianshe JS125-6B, Maintenance Manual

Page: 45 / 210

PERIODIC INSPECTION AND ADJUSTMENT
35
Insufficient compressure will bring about perfor-
mance degradation.
1. Check
Valve clearance
Out of specification Adjust clearance
Refer to Valve clearance adjustment
2. Start the engine, and pre-warm it for several
minutes.
3. Stop the engine
4. Disassemble: spark plug
5. Install
Pressure indicator
Connector
Note
6. Check
Compressure
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Checking steps
Start the engine with the kick starting device or the
electric starter when the throttle is opened fully until
the reading of the pressure indicator reaches a maxi-
mum value, and then read it.
Check the reading by the specification.
7. Install
Spark plug, spark plug cap
Too lower compressure
A.The throttle joints badly, which gives rise to com-
pressive leak.
B.Bad adjustment of the throttle clearance.
C.Wear the piston, cylinder and piston ring
Too higher compressure
A. Carbon deposit of the cylinder head chamber
B. Carbon deposit of the piston head
*******************************************
The Connector of the pressure indicator
Standard compressure value:
1200kPa (12kg/cm
2
)
Inspect compression pressure