CF MOTO CF125T-19 2003, Service Manual

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20 Troubleshooting
20
20-1
Operation notice
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20-1
Starting failure/Hard starting
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20-1
Unstable engine running or engine stops
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20-3
Poor engine performance in high-speed range
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20-4
Poor idle speed performance
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20-5
Poor engine performance at middle or high speed
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20-7
Operating notice
This chapter is a general explanation of major troubleshooting of the whole engine.
Refer to the relevant chapters for troubleshooting not listed in this chapter.
Starting failure/hard starting
In case of starting failure or hard starting, refer to chapter 17 and check the starting system.
Fue not reached No fuel in fuel tank
Clogged fuel hose
Clogged float valve
Reached clogged fuel filter
Clogged fuel tank cap breather hole
Weak spark or faulty spark plug
No spark Stained or damaged Spark
plug
strong spark Broken high tension coil or short circuit
Broken Ignition coil or short circuit
Faulty ignition switch
Low or no Faulty CDI unit
Compression Faulty contacting coil pressure
Loose cylinder head
Worn or damaged Cylinder and piston ring
With compression pressure Broken cylinder gasket
Starting failure Deteriorated fuel
but near to start Improper idle speed adjustment
Secondary air intake into air intake pipe
No starting sign Improper ignition timing
Clogged air filter
Wet spark plug carburetor overflow
Excessive opening of valve
Clogged air filter
dry spark plug
No Air current Faulty starting enriching device
Remove spark plug and mount it to
spark plug cap, get it earthed and
check spark
Measure compression pressure
Try starting
Remove spark plug and check again
Remove carburetor after 30 minutes,
connect ethylene pipes with fuel
increment loop and blow