DAELIM ROADWIN VJ125 - SERVICE, Service Manual

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21-2
TROUBLESHOOTING
ENGINE LACKS POWER
Pressure normal
Pressure low
●
Punctured tire.
●
Faulty tire valve.
1. Check tire pressure.
Wheel rotate freely.
Wheel don’t rotate
freely
● Dragged brake.
●
Worn or damaged wheel bearings.
●
Lacked wheel bearings lubrication.
●
D
●
Axle nut tightened excessively.
2. Raise wheels off ground and
rotate by hands.
Engine speed increased.
Engine speed not
changed.
●
Clutch slipping.
●
Worn clutch disk and plate.
●
Damaged clutch disk and plate.
3. Accelerate suddenly.
Engine speed increased.
Engine speed
doesn’t increase.
●
Closed carburetor choke.
●
Clogged fuel aisle.
●
Clogged air cleaner.
● Clogged fuel tank breather.
●
Clogged muffler.
4. Accelerate lightly.
Correct
Incorrect
● Faulty C.D.I unit.
●
Faulty pulse generator.
5. Check ignition timing by
using timing light.
Correct
Incorrect
●
Improper valve adjustment.
●
Worn valve seat.
6. Check valve clearance
Compression normal
Low
●
Improper valve operation.
●
Worn cylinder and piston ring.
●
Worn cylinder head gasket.
●
Incorrect valve timing.
7. Measure the cylinder
compression.
Not clogged
Clogged
●
Damaged fuel strainer or screen.
●
Poor carburetor maintenance.
8. Check the carburetor for
clogging.
INSPECTION CAUSE OF TROUBLE