What to do if HYOSUNG GF125 Motorcycle experiences overflow and fuel level fluctuations?
If your HYOSUNG Motorcycle is experiencing overflow and fuel level fluctuations, you may need to replace certain components. Additionally, checking and adjusting settings, cleaning parts, and adjusting the float height might resolve the issue.
General| Fuel System | Carburetor |
|---|---|
| Rear Brake | Drum |
| Seat Height | 780 mm |
| Width | 760 mm |
| Height | 1, 070 mm |
| Ground Clearance | 160 mm |
| Engine Type | Air cooled, 4 stroke, single cylinder |
| Transmission | 5-speed |
| Front Suspension | Telescopic fork |
| Front Brake | Disc |
| Rear Suspension | Twin shock absorbers |
Identifies the locations of the frame and engine serial numbers for registration and parts ordering.
Specifies the recommended octane rating for gasoline and the appropriate engine oil classification and viscosity.
Provides guidelines for the initial period of motorcycle operation to ensure proper engine component seating and longevity.
Highlights key improvements and unique aspects of the GF 125 model, focusing on engine performance and rider comfort.
Details the specific engineering aspects of the engine's cylinder head, piston, connecting rod, and cam chain.
Explains improvements to the primary gear ratio and clutch durability for enhanced driving performance.
Describes the valve angles, rocker arm, and overall valve train design for optimal power and efficiency.
Details the materials and design features of the camshaft, lock arm, and valves for durability and performance.
Explains the operation and advantages of the new capacitor discharge ignition system for consistent timing.
Lists and describes specific materials and lubricants required for maintenance and repair procedures.
Outlines essential safety precautions and general instructions to be followed during disassembly and reassembly.
Provides detailed technical specifications for dimensions, mass, engine, transmission, and more.
Lists recommended intervals for all periodic service work to maintain peak performance and economy.
Details procedures for inspecting, checking electrolyte level, and maintaining the motorcycle battery.
Covers tightening procedures for cylinder head nuts, cylinder nuts, and exhaust pipe bolts and nuts.
Provides instructions for cleaning the air cleaner element to maintain engine performance and fuel efficiency.
Explains how to check and adjust valve clearance for optimal engine operation and to prevent damage.
Details the procedure for measuring cylinder compression pressure to diagnose engine health.
Covers spark plug inspection, cleaning, gap adjustment, and replacement recommendations.
Instructs on inspecting the fuel line and connections for damage and fuel leakage.
Provides steps for cleaning the fuel strainer to ensure smooth fuel flow and prevent power loss.
Details the procedure for changing the engine oil, including draining, refilling, and level checking.
Explains the process for replacing the engine oil filter to maintain lubrication system integrity.
Describes how to check the engine oil pressure to diagnose lubrication system issues.
Provides instructions for cleaning the oil sump filter to remove foreign matter.
Covers carburetor inspection, including idling adjustment and throttle cable play.
Explains how to inspect and adjust the clutch play for proper engagement and disengagement.
Details procedures for inspecting, checking slack, cleaning, and lubricating the drive chain.
Covers inspection of front brake fluid level, pads, and brake light switch.
Explains the procedure for purging air from the front brake fluid circuit to restore braking performance.
Covers adjustments for rear brake pedal travel and inspection of brake lining wear.
Details inspection of tire tread depth and pressure for safe operation.
Explains how to inspect steering stem bearings for proper adjustment and smooth handlebar movement.
Provides instructions for changing the front fork oil, including draining and refilling.
Lists tightening torques for various chassis and engine mounting bolts for safety and structural integrity.
Details procedures for measuring engine compression and oil pressure to diagnose performance issues.
Step-by-step guide for safely removing and reinstalling the engine from the motorcycle frame.
Instructions for disassembling the engine's upper end components, including the cylinder head and camshaft.
Covers inspection and servicing procedures for camshaft holder, rocker arms, and valves.
Details the process for reassembling the engine's upper end components, including piston rings and cylinder.
Step-by-step instructions for disassembling the left side of the engine, including the magneto rotor.
Step-by-step instructions for disassembling the right side of the engine, including the clutch and engine sprocket.
Instructions for disassembling the engine's lower end components, focusing on the crankcase and transmission.
Covers inspection and servicing of crankshaft runout, conrod deflection, and big end side clearance.
Details the reassembly process for the engine's lower end components, including crankshaft and transmission.
Covers removal, cleaning, and inspection of the fuel cock assembly to ensure proper fuel flow.
Lists detailed specifications for the carburetor, including jet sizes, float height, and idle speed.
Provides step-by-step instructions for removing, disassembling, and inspecting the carburetor.
Details the procedure for inspecting, cleaning, and adjusting the accelerator pump diaphragm and components.
Covers inspection of the float, needle valve, and valve seat for wear and proper function.
Explains how to remove, clean, and inspect the carburetor jets for damage or clogging.
Provides instructions for reassembling and remounting the carburetor, including jet and screw installation.
Details the procedure for checking and adjusting the float height for correct fuel level in the carburetor.
Explains how to adjust the accelerator pump rod clearance after component replacement.
Covers the procedure for adjusting the pilot screw to set the correct engine idle speed.
Illustrates the engine's lubrication system, showing oil flow paths to various components.
Explains the capacitor discharged ignition system, its components, and how it generates a spark.
Details how to measure resistance of magneto coils (pick-up, power source, charging) using a pocket tester.
Provides a table and instructions for measuring resistance between CDI unit lead wires.
Covers checking the ignition coil for sparking performance and resistance.
Lists the primary and secondary resistance values for the ignition coil.
Covers cleaning, checking gap, and testing spark plug performance.
Illustrates the charging system circuit, including AC generator, regulator/rectifier, and battery.
Details how to measure DC voltage at the battery terminals to verify charging system output.
Explains how to test AC generator performance by measuring AC voltage between lead wires.
Provides a table for measuring resistance values of the regulator/rectifier using a pocket tester.
Describes the starter system components and how depressing the starter button activates the starter motor.
Step-by-step guide for removing and disassembling the starter motor for inspection or repair.
Covers inspection of starter motor carbon brushes, commutator, and armature coil.
Details the process for reassembling the starter motor, including brush holder and housing alignment.
Explains how to inspect the starter relay for continuity and coil resistance.
Covers inspection of the speedometer assembly for continuity between lead wires.
Details the various lights on the motorcycle, including headlights and turn signals.
Provides information on the headlight assembly and its components.
Covers inspection and replacement of turn signal lights.
Covers inspection and replacement of tail and brake lights.
Details how to inspect various switches for continuity using a pocket tester.
Explains the operation of the dimmer switch for controlling headlight beam.
Covers inspection of the gear position indicator light switch.
Explains the function and inspection of the turn signal light switch.
Covers the operation and inspection of the horn switch.
Explains the operation and inspection of the rear brake light switch.
Covers the operation and inspection of the neutral indicator light switch.
Explains the operation and inspection of the passing switch.
Provides technical specifications for the motorcycle battery, including type, capacity, and electrolyte S.G.
Details the procedure for filling electrolyte and the initial charging process for a new battery.
Covers battery servicing, checking electrolyte level, and recharging based on specific gravity readings.
Provides information on battery service life, factors affecting it, and maintenance for long-term storage.
Step-by-step guide for removing and disassembling the front wheel, including bearings and brake disc.
Covers removal, disassembly, inspection, and reassembly of the front fork assembly.
Details the removal, disassembly, inspection, and reassembly of the steering stem and bearings.
Covers the entire front brake system, including caliper, pads, disc, and master cylinder servicing.
Provides procedures for removing, disassembling, inspecting, and reassembling the rear wheel and brake system.
Details the removal, disassembly, inspection, and reassembly of the rear swing arm and related components.
A comprehensive guide to diagnosing and resolving common engine, electrical, and chassis problems.
Lists all special tools required for performing maintenance and repair procedures on the motorcycle.
Provides essential torque values for various engine and chassis fasteners to ensure proper assembly and safety.
A general chart for determining tightening torques based on bolt diameter and type.
Contains critical technical data and specifications for engine, transmission, and chassis components.
Illustrates the correct routing for all wires and cables to prevent damage and ensure proper function.
A detailed schematic showing the electrical system connections, wire colors, and component layout.
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