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HYOSUNG Comet 250 Comet 125 GT150 250 2002 Repair Service Manual pdf manual

This guide repair manual contains an introductory description on HYOSUNG GT150 250 Comet250 125 and procedures for its inspection/service and overhaul of its main components. Other information considered as generally known is not included. Read GENERAL INFORMATION section to familiarize yourself with outline of the vehicle and MAINTENANCE and other sections to use as a guide for proper inspection and service. This manual will help you know the vehicle better so that you can assure your customers of your optimum and quick service.

HYOSUNG Comet 250 Comet 125 GT150 250 2002 Repair Service Manual

HYOSUNG Comet 250 Comet 125 GT150 250 2002

pdf Download now 2002 HYOSUNG Comet 250 Comet 125 GT150 250 Repair Service Manual.

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This Repair Manual Covers: 

GENERAL INFORMATION

PERIODIC MAINTENANCE

ENGINE

FUEL SYSTEM

ELECTRICAL SYSTEM

CHASSIS

SERVICING INFORMATION

CYLINDER CLASSIFICATION:

The engine of Comet 250 Comet 125 is composed of the two cylinder, is classified into the front cylinder and
rear cylinder as basis of the motorcycle ahead.

HYOSUNG Comet 250 Comet 125 GT150 250 2002 Repair Service Manual 1

Rear cylinder,Front cylinder

IGNITION SYSTEM:

HYOSUNG Comet 250 Comet is started as the battery discharged ignition system without a contact point. The battery ignition system is composed a rotor with five rotor tip, the D.C CDI, the ignition coil and battery. This system ignites after get signal from ignition timing of pick-up with the electric energy of this battery and occur the 1st electric current. Therefore, a high voltage.

HYOSUNG Comet 250 Comet 125 GT150 250 2002 Repair Service Manual 2

TROUBLESHOOTING

Complaint:Engine will not start, or is hard to start.

Symptom and

Compression too low

1. Valve clearance out of adjustment.

2. Worn valve guides or poor seating of valves.

3. Valves mistiming

4. Piston rings excessively worn.

5. Worn-down cylinder bore.

6. Poor seating of spark plug.

7. Starter motor cranks but too slowly.

Plug not sparking

1. Fouled spark plug.

2. Wet spark plug.

3. Defective ignition coil.

4. Open or short circuit in high tension cord.

No fuel reaching the carburetor

1. Clogged hole in the fuel tank cap.

2. Clogged or defective fuel cock.

3. Defective carburetor float valve.

4. Clogged fuel pipe.

Adjust.

Repair or replace.

Adjust.

Replace.

Replace or rebore.

Retighten.

Consult

Complaint:Engine stalls easily

1. Fouled spark plug.

2. Clogged fuel hose.

3. Clogged jets in carburetor.

4. Valve clearance out of adjustment.

Clean.

Clean.

Clean.

Adjust.

Complaint:Noisy engine.

 

Excessive valve chatter

1. Valve clearance too large.

2. Weakened or broken valve springs.

3. Worn down camshaft.

Noise appears to come from piston

1. Piston or cylinder worn down.

2. Weakened or broken valve springs.

3. Worn down piston pin or piston pin bore.

4. Piston rings or ring groove worn.

Noise seems to come from timing chain

1. Stretched chain.

2. Worn sprockets.

3. Tension adjuster not working.

Noise seems to come from clutch

1. Worn splines of countershaft or hub.

2. Worn teeth of cluth plates.

3. Distorted clutch plates, driven and drive.

Noise seems to come from crankshaft

1. Worn or broken bearings.

2. Big-end bearings worn and broken.

3. Thrust clearance too large.

Adjust.

Replace.

Replace.

Replace.

Replace.

Replace.

Replace.

Replace.

Replace.

Repair or replace.

Replace.

Replace.

Replace.

Replace.

Replace.

Replace.

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