Positioning:
A budget-friendly performance motorcycle offering a stylish design and capable engine for its class.
Competitors:
Kawasaki Ninja 250, Honda CBR250R (though the GT250 typically offered a larger displacement within the 250cc class).
Styling:
Sportbike-inspired 'Comet' styling, often with a full fairing.
Engine Configuration:
V-twin engine configuration, a notable feature for the 250cc segment.
Value Proposition:
Offers a distinct aesthetic and a V-twin experience at a competitive price point.
Primary Coverage:
Service and Repair Procedures
Secondary Coverage:
Maintenance, Troubleshooting, Specifications
Estimated Page Count:
Refer to factory original service manual for exact count
Type:
Service Repair Manual
Also Known As:
Workshop Manual, Repair Manual, Service Manual
Delivery Method:
Instant Download
Compatibility:
Windows and Mac OS
Engine Mechanical:
Disassembly, assembly, inspection, repair of engine components
Fuel System:
Carburetor system, fuel delivery, fuel tank
Ignition System:
Ignition coil, spark plugs, CDI unit
Cooling System:
Radiator, fan, coolant circuits
Transmission:
Clutch, gearbox, internal components
Drivetrain:
Final drive, chain and sprockets
Brakes:
Front and rear brake systems, hydraulic lines, calipers, master cylinders
Suspension:
Front forks, rear shock absorber, linkage
Steering:
Handlebars, steering stem, bearings
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter
Bodywork:
Fairings, fuel tank, seat, body panels
Wheels And Tires:
Wheel bearing inspection, tire replacement
Maintenance:
Regular service intervals, fluid changes, filter replacements
Troubleshooting:
Diagnostic procedures for common issues
Repair:
Step-by-step repair instructions for all major components
Disassembly:
Detailed instructions for removing and separating parts
Assembly:
Detailed instructions for reassembling components
Cleaning:
Procedures for cleaning specific parts
Reinstallation:
Correct procedures for reinstalling components
Depth:
Comprehensive, suitable for professional technicians and advanced DIYers
Target Audience:
Professional technicians and experienced DIY mechanics
Engine Type:
Liquid-cooled, 4-stroke, 8-valve, DOHC V-twin
Displacement:
249.7 cc (250cc class)
Bore X Stroke:
57.0 mm x 49.0 mm (typical specification, verify with manual)
Compression Ratio:
10.2:1 (typical specification, verify with manual)
Horsepower:
Approximately 28-30 HP (verify with manual, varies by market/tuning)
Torque:
Approximately 15-16 lb-ft (verify with manual, varies by market/tuning)
Fuel Delivery:
Carbureted (likely dual Mikuni carburetors, verify with manual)
Fuel Type:
Unleaded gasoline
Oil Type:
API SG, SAE 10W-40 or 20W-50 motorcycle oil (verify with manual)
Oil Capacity:
Approx. 1.6 liters (dry fill, verify with manual)
Overall Length:
Refer to manual for exact specifications
Overall Width:
Refer to manual for exact specifications
Overall Height:
Refer to manual for exact specifications
Dry Weight:
Approx. 165-170 kg (verify with manual)
Gross Vehicle Weight Rating:
Refer to manual for exact specifications
Front Tire Size:
110/70-17 (typical, verify with manual)
Rear Tire Size:
150/70-17 (typical, verify with manual)
Crash Test Results:
N/A (Motorcycle safety ratings differ from automobiles)
Braking System:
Disc brakes front and rear
ABS:
Not typically available on this model year and class.
Lighting:
Halogen headlight, taillight, turn signals.
Oil Change Interval:
Every 3,000 km or 6 months (verify with manual for precise intervals)
Spark Plug Replacement:
Every 6,000-10,000 km (verify with manual)
Valve Clearance Check:
Every 6,000-12,000 km (verify with manual)
Coolant Type:
Ethylene glycol-based antifreeze with distilled water (50/50 mix, verify with manual)
Brake Fluid Type:
DOT 4 (verify with manual)
Electrical Connections:
Some owners report occasional issues with electrical connectors due to vibration or corrosion; proper inspection and dielectric grease application are recommended.
Carburetor Synchronization:
V-twin engines can require periodic synchronization for optimal performance and smooth running.
Chain Maintenance:
Regular cleaning, lubrication, and adjustment of the drive chain are crucial for longevity and performance.
Manufacturer:
Hyosung Motors & Heavy Industries, a South Korean manufacturer known for its motorcycles and industrial equipment.
Genesis:
The Comet series represents Hyosung's offering in the sportbike and naked sportbike segments, aiming to provide accessible performance.
Gt250:
The GT250 is a derivative of earlier Hyosung 250cc V-twin models, often featuring styling updates and chassis refinements.
Production Period:
The GT250 model line has been in production for several years, with the 2005 model being part of this evolution.
