Model:
Comet GT125 / GT250
Model Years Covered:
2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Engine Codes Implied:
Varies by specific GT125/GT250 variant within the covered years, likely including V-twin configurations.
Market Position:
A comprehensive factory service manual aimed at DIY enthusiasts and independent repair shops seeking official documentation for the Hyosung Comet GT125 and GT250 models from the specified production years. Positions itself as an indispensable tool for cost-effective maintenance and repair.
Target Audience:
Enthusiast owners, DIY mechanics, and independent repair shops specializing in Hyosung motorcycles. Also beneficial for those looking to understand their vehicle better to communicate effectively with mechanics.
Competitive Analysis:
Distinguishes itself from third-party manuals by being an 'Actual Genuine Repair Service Factory Manual.' Emphasizes providing the same level of detail and accuracy that professional technicians use, offering a significant advantage over generic guides.
Key Features:
Authentic factory content, extensive coverage across all major systems, detailed step-by-step instructions with illustrations, advanced troubleshooting guidance, direct digital download for immediate access, printable format for convenient workshop use, and potential for significant labor cost savings.
Coverage Areas:
Comprehensive coverage for both Hyosung Comet GT125 and GT250 models from 2002-2010.
Page Count:
Hundreds of pages (exact number not specified, but implied to be extensive).
Manual Type:
Factory Service Repair Manual
Delivery Method:
Digital download link provided immediately after payment completion.
Systems Covered:
General Information, Fuel System, Cooling System, Engine Top End, Clutch, Engine Lubrication System, Engine Removal/Installation, Crankshaft/Transmission, Wheels/Tires, Final Drive, Brakes, Suspension, Steering, Frame, Electrical System, Appendix.
Wiring Diagrams:
Detailed electrical system diagrams, including power distribution, ignition system, lighting, starting system, and instrumentation, are a key component of the manual's coverage.
Procedures Included:
Diagnosis of engine fault symptoms, evaluation of repair approaches, part testing techniques, wiring diagram tracing and verification, engine management system analysis, common fixes, pre-emptive maintenance checks, complete repair procedures, troubleshooting, electrical service procedures, tuning.
Troubleshooting Guide:
Includes an advanced troubleshooting guide with diagnostic trees and symptom-based problem resolution, crucial for identifying and rectifying issues efficiently.
Technical Depth:
Factory-level detail, covering fundamentals to advanced diagnostics and repair. Designed to provide knowledge equivalent to factory-trained technicians. Includes detailed illustrations, diagrams, and photos.
Repair Procedure Format:
Detailed substeps are provided for each repair procedure, with clear notes, cautions, and warnings to ensure accuracy and safety. Numbered instructions and bold figure numbers enhance usability.
Searchability:
PDF format allows for keyword searching to quickly locate specific information within the manual.
Print Quality:
High Resolution, Printable (entire manual or selected pages)
Printable Flexibility:
Allows users to print only the necessary pages or the entire manual, offering flexibility and reducing paper waste.
Binding Type:
Digital Download (Printable PDF)
Paper Type:
N/A (Digital)
Software Requirements:
Adobe PDF Reader
Primary Engine:
Likely a V-twin configuration for both GT125 and GT250, with displacement variations. Specific bore, stroke, compression ratios, and power output figures would be detailed within the manual for each specific engine variant.
Engine Design:
V-twin, air-cooled or liquid-cooled, 4-stroke configurations are highly probable for both GT125 and GT250 models during this period. The manual will confirm specific engine architecture.
Performance Metrics:
The manual will contain specifications for horsepower, torque, and engine RPM ranges for optimal performance, as well as details on engine tuning. Exact figures depend on the specific GT125 or GT250 variant and its market configuration.
Fuel System Details:
Detailed information on carburetor systems (likely for this era of bikes) or early fuel injection systems, including component identification, adjustment procedures, troubleshooting, and specifications for fuel pressure and flow rates. Carburetor synchronization and jetting information would be included.
Carburetor Specifications:
If carbureted, the manual will list specific carburetor models, jet sizes, needle settings, idle speed, and float bowl levels for optimal fuel-air mixture across different altitudes and conditions.
Transmission Type Standard:
Likely a multi-speed constant mesh gearbox, with the number of gears varying between GT125 and GT250 models (e.g., 5-speed or 6-speed).
Transmission Type Optional:
No optional transmission types are typically offered for this model range within this period.
Transmission Features:
The manual covers clutch operation, gearbox disassembly and reassembly, gear inspection, shift mechanism troubleshooting, and lubrication specifications for the transmission and final drive.
Overall Length:
Specific dimensions for GT125 and GT250 are model-dependent and will be detailed in the manual.
Dry Weight:
Specific dry weight for GT125 and GT250 variants will be provided in the manual, crucial for handling and transport.
Wet Weight:
The manual will contain figures for wet weight (including all fluids), essential for performance calculations and maintenance.
Safety Ratings:
No formal crash safety ratings are typically issued for motorcycles of this class. The manual focuses on mechanical integrity and safe operation.
Active Safety Features:
Information on braking systems (likely hydraulic disc brakes front and rear), suspension tuning for stability, and tire maintenance for optimal grip will be covered.
Passive Safety Features:
The manual will detail the structural integrity of the frame and chassis, ensuring safe rider support. It also covers electrical safety, preventing short circuits and system failures.
Infotainment System:
Motorcycles of this era typically have basic instrumentation (speedometer, tachometer, odometer, fuel gauge). The manual will cover the operation and troubleshooting of these indicators and warning lights.
Driver Assistance Features:
N/A for this model and era; focus is on mechanical and electrical systems.
Connectivity Features:
N/A for this model and era.
Service Intervals:
The manual will provide detailed recommended service intervals for oil changes, filter replacements, spark plug checks, valve adjustments, chain maintenance, brake fluid flushes, and other critical maintenance tasks. These are typically based on mileage or time.
Tire Pressure Recommendations:
Recommended tire pressures for front and rear tires under various load conditions will be provided, crucial for handling and tire longevity.
Engine Oil Type:
The manual will specify the correct API service classification (e.g., SG, SH, SJ) and viscosity grade (e.g., 10W-40, 20W-50) for engine oil, based on ambient temperature. Likely a motorcycle-specific JASO MA certified oil.
Coolant Type:
For liquid-cooled models, the manual will specify the type of coolant (e.g., ethylene glycol-based antifreeze) and the correct mixture ratio with distilled water.
Brake Fluid Type:
Likely DOT 4 or DOT 5.1 hydraulic brake fluid, with instructions for periodic replacement to prevent moisture absorption.
Transmission Oil Type:
Specific transmission oil type and capacity will be detailed, often a dedicated gear oil or the same motor oil used in the engine for shared sump designs.
Common Issues Addressed:
The manual will provide troubleshooting guidance for common issues such as carburetor performance problems, electrical gremlins, clutch slippage, brake fade, and potential wear-related issues specific to the GT125/GT250 components. This includes diagnostic flowcharts and common failure points.
Brand Heritage:
Hyosung (now S&T Motors, and later KR Motors) is a South Korean manufacturer with a history of producing a range of motorcycles, often known for offering good value and competitive specifications in various market segments.
Model Evolution:
The Comet series has been a staple for Hyosung, with the GT125 and GT250 variants offering accessible performance and styling, often in cruiser or sport-cruiser aesthetics. Model updates within the 2002-2010 period would primarily involve minor styling refinements, component upgrades, and potential emissions compliance adjustments.
Production Location:
South Korea
