DAELIM ROADWIN VJ125 - Engine Lacks Power

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