The Comet 250 GT250, a 2008 model, is a sportbike characterized by its distinctive V-twin engine, offering an engaging riding experience and sporty aesthetics. Positioned as an accessible entry-level option, it provided a unique mechanical character and styling within its competitive segment. Engineered for riders seeking a blend of performance and visual appeal, the GT250 aimed to deliver reliable transportation with a touch of excitement, making it a notable choice for those entering the sportbike world or seeking an affordable yet distinctive machine.
This comprehensive service repair manual provides detailed guidance for the maintenance, repair, and troubleshooting of the 2008 Comet 250 GT250. It covers a wide array of systems, including engine mechanicals, fuel and ignition systems, electrical components, cooling, lubrication, transmission, clutch, chassis, suspension, brakes, wheels, tires, and bodywork. The manual includes step-by-step procedures for disassembly, assembly, cleaning, inspection, adjustment, and repair, along with essential technical specifications, torque values, and diagnostic insights, making it an indispensable resource for owners and technicians.
Generation Name:
1st Generation (GT Series)
Engine Code:
Not explicitly provided in product info, but typically a V-twin designation for Hyosung 250cc models.
Market Position:
The Hyosung Comet 250 GT250 was positioned as an accessible, stylish, and sporty entry-level sportbike, often competing with other 250cc Japanese and Korean models. It offered a V-twin engine configuration for a distinct character.
Competitive Analysis:
Competitors typically included models like the Kawasaki Ninja 250, Honda CBR250R, and Yamaha R25 (though market availability varied). The GT250 aimed to provide a value proposition with its V-twin engine and distinctive styling.
Key Features:
Sportbike styling, V-twin engine for character and sound, accessible performance for newer riders, relatively affordable price point.
Manual Value Proposition:
Provides factory-level repair and maintenance knowledge, enabling owners and technicians to perform complex tasks accurately and efficiently, thus saving costs and ensuring longevity of the vehicle.
Coverage Areas:
Comprehensive service, repair, and maintenance for the 2008 Hyosung Comet 250 GT250.
Page Count:
Not specified, but typical factory service manuals are extensive, often exceeding 300 pages for detailed coverage.
Manual Type:
Service Repair Manual / Workshop Manual
Systems Covered:
Engine Mechanical, Fuel System, Ignition System, Electrical System, Cooling System, Lubrication System, Transmission, Clutch, Chassis, Suspension (Front & Rear), Brakes (Front & Rear), Wheels & Tires, Bodywork, Frame, Lighting, Instruments, Troubleshooting, Maintenance Procedures, Specifications, Torque Values.
Procedures Included:
Disassembly, Assembly, Cleaning, Inspection, Lubrication, Adjustment, Repair, Reinstallation, Troubleshooting Guides, Diagnostic Procedures, Routine Maintenance, Scheduled Service.
Technical Depth:
Designed for professional technicians and advanced DIY mechanics. Covers detailed step-by-step repair instructions, critical specifications, and factory-level diagnostic insights. Assumes basic mechanical and electrical knowledge.
Print Quality:
Full Printable. Allows for high-resolution printing of all pages and diagrams.
Binding Type:
Digital Download (PDF)
Paper Type:
N/A (Digital)
Features:
Zoom IN/OUT capability, Searchable Text (inherent to PDF), Instant Download.
Requirements:
Adobe PDF Reader, WinZip (for initial download extraction if zipped).
Compatibility:
All Versions of Windows & Mac operating systems.
Engine Type:
4-stroke, DOHC, V-twin
Displacement:
249 cc (approx.)
Bore X Stroke:
Not explicitly provided, but typically around 57 mm x 48.8 mm for this engine configuration.
Compression Ratio:
Not explicitly provided, but likely in the range of 10.0:1 to 11.5:1.
Horsepower:
Approximately 29-30 HP at around 9,000-10,000 RPM (subject to specific tuning and market).
Torque:
Approximately 23-24 Nm at around 7,000-7,500 RPM (subject to specific tuning and market).
Fuel Delivery:
Carbureted (likely Keihin CVK or similar twin carburetors) or Fuel Injection depending on specific market variant. Manual covers either system.
Cooling Method:
Liquid-cooled
Oil Capacity:
Refer to manual for precise quantity, typically around 1.8-2.0 liters with filter change.
Valve Train:
DOHC, 4 valves per cylinder
Transmission Type:
5-speed manual
Optional Transmission:
N/A
Clutch Type:
Wet, multi-plate
Transmission Oil Type:
Refer to manual for specific API GL-4 or GL-5 gear oil, or SAE 10W-40 motorcycle oil.
Length:
Not specified in product info, refer to manual.
Width:
Not specified in product info, refer to manual.
Height:
Not specified in product info, refer to manual.
Dry Weight:
Approximately 165-170 kg (dry).
Wet Weight:
Approximately 180-185 kg (wet, with fluids).
Front Tire Size:
110/70-17 (typical)
Rear Tire Size:
150/70-17 (typical)
Fuel Tank Capacity:
Approximately 17 liters (5.2 gallons).
Safety Ratings:
Not applicable for this type of vehicle; safety is determined by design and rider skill. Manual provides guidance on safe operation and maintenance.
Active Safety Features:
Disc brakes front and rear. Some models may have ABS as an option (refer to manual for specific configuration).
Passive Safety Features:
Reinforced frame structure, standard lighting and signaling.
Front Brake Type:
Hydraulic disc brake
Rear Brake Type:
Hydraulic disc brake
Infotainment System:
Basic analog/digital instrument cluster: Speedometer, tachometer, odometer, fuel gauge, indicator lights. No advanced infotainment features typical of modern cars.
Driver Assistance Features:
None. Focus is on core motorcycle mechanics and operation.
Connectivity Options:
None.
Oil Change Interval:
Typically every 3,000-5,000 km or 6 months, refer to manual for exact interval and oil type.
Chain Lubrication Interval:
Every 500-1,000 km and after riding in wet conditions.
Valve Clearance Check:
Typically every 10,000-15,000 km. Crucial for performance and longevity.
Engine Oil Grade:
SAE 10W-40 (API SG or higher is commonly recommended; consult manual for precise specification).
Coolant Type:
Ethylene glycol based antifreeze mixture (50/50 with distilled water). Refer to manual for specific formulation.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (check reservoir cap or manual).
Known Issues:
Typical for older motorcycles: Carburetor synchronization issues, potential stator or rectifier problems, chain and sprocket wear, general electrical connections, and fuel system maintenance. Manual provides troubleshooting for these.
Spark Plug Recommendation
Spark Plug Type:
CR9E or similar (refer to manual for exact plug and gap specification).
Battery Type:
12V, typically 10-12 Ah (e.g., YTX12-BS or similar). Refer to manual for exact specifications.
Brand Heritage:
Hyosung (now S&T Motors, and later revived as KR Mobility) is a South Korean manufacturer known for producing a range of motorcycles, scooters, and ATVs. They have a history of building reliable and affordable vehicles.
Model Evolution:
The Comet 250 (GT250) is part of Hyosung's sportbike lineup, evolving from earlier models. The GT250 represented a modern iteration with updated styling and performance characteristics for its class.
Production Period:
The GT250 model line was produced for several years, with the 2008 model being a specific iteration within that production run.
Recognitions:
No specific major awards are commonly cited for this model. Its appeal was primarily based on value and styling in its segment.
Consumer Ratings:
User reviews often highlight its good value for money, distinctive V-twin character, and comfortable riding position for its class, while acknowledging some areas of build quality compared to premium Japanese brands.
