Common Failures And Troubleshooting - um CHILL 125 cc. Service Manual

Common Failures and Troubleshooting

Fault system
The motorcycle is difficult to
Air intake/exhaust
be started or is short of
system
power.
Environmental Emitted pollutants exceed
protection device applicable standards
Ignition system Weak spark or no spark
The engine is difficult to be
Air distribution system started up or the idling is not
CHILL 125 cc. SERVICE MANUAL AND EFI DIAGNOSTIC
Fault
The Air filter element is blocked;
The air filter leaks;
The air filter has too much dust;
The air filter housing leaks;
Too much carbon is built up at the exhaust port;
The exhaust port leaks;
The silencer is blocked.
Too much carbon is built up at the secondary air intake
port.
The air pump is blocked or damaged.
The air pump filter is blocked or damaged.
The intake rubber hose is aged or leaks.
The clamp is loose or damaged.
There is carbon buildup or dirt on the spark plug.
The spark plug gap is improper.
The insulation part of the spark plug is damaged,
resulting in Short-circuit of electrodes.
Short-circuit of the ignition coil
C.D.I igniter is faulty.
The impulse generator is faulty.
The connection of the ignition system is loose.
The sealing washer of the cylinder head leaks.
The adjustment of the valve lash is incorrect .
The air valve stem bends.
stable
Th elasticity of the air valve spring is reduced.
Causes
Clean the air filter element
Replace the air filter
Clean the air filter element.
Repair or change the air filter housing.
Clean the carbon buildup at the exhaust port.
The exhaust port leaks.
The silencer is blocked.
Clean the carbon buildup at the secondary air intake port.
Replace the air pump.
Replace the air pump filter.
Replace the intake rubber hose.
Replace the clamp.
Clean the carbon buildup and dirt on the spark plug .
Adjust the gap to 0.6mm~0.7mm
Replace the spark plug
Replace the ignition coil
Replace C.D.I igniter.
Replace the impulse generator.
Check each connection.
Replace the sealing washer or apply some sealant.
Adjust the valve lash to 0.10mm~0.14mm
Replace the air valve.
Replace the air valve spring.
Troubleshooting
20