Target Audience:
Hyosung GV250 Aquila and GT250 Comet owners seeking to perform their own maintenance and repairs, and independent motorcycle workshops.
Value Proposition:
Provides significant cost savings compared to dealership servicing by enabling DIY repairs with expert-level guidance.
Ease Of Use:
Features step-by-step instructions and pictures to simplify complex procedures.
Accessibility:
Instantly downloadable and accessible on multiple devices (PC, Mac, tablets, smartphones).
Engine Systems:
Engine assembly, disassembly, lubrication, cooling, fuel injection system (Ei), ignition system, exhaust system, starting system, charging system.
Transmission Systems:
Clutch operation and maintenance, gearbox internals, shift mechanism, final drive (chain and sprockets).
Chassis Systems:
Frame inspection and repair, suspension (front forks, rear shock absorber), steering system, wheels and tires, brake systems (front and rear discs), electrical system (wiring diagrams, lighting, indicators, horn, battery).
Bodywork And Fittings:
Body panel removal and installation, seating, fuel tank, fenders, fairings, instrumentation, controls.
Routine Maintenance:
Oil changes, filter replacements, spark plug service, chain adjustment and lubrication, tire pressure checks, brake pad inspection, coolant checks.
Troubleshooting Diagnostics:
Step-by-step diagnostic procedures for common problems, fault finding for electrical and mechanical issues, error code interpretation (if applicable to Ei models).
Repair Rebuild:
Detailed instructions for engine component overhaul (pistons, rings, valves), transmission rebuild, suspension fork service, brake caliper overhaul, electrical component replacement.
Specifications Data:
Torque specifications, clearance measurements, fluid capacities, electrical resistance values, engine timing, emissions data (where applicable).
Depth Of Coverage:
Comprehensive from basic maintenance to full engine and component rebuilding, suitable for DIY enthusiasts and professional technicians.
Print Quality:
High quality, designed to be printable chapter by chapter or in its entirety.
Binding Type:
Not applicable (downloadable digital format)
Paper Type:
Not applicable (downloadable digital format)
Required Software:
Adobe Reader (or compatible PDF reader)
Engine Type:
Air-cooled, 4-stroke, V-twin
Displacement:
249 cc (250cc class)
Fueling System:
Electronic Fuel Injection (Ei) for 2009-2012 models
Horsepower Estimated:
Approximately 27-30 HP (specific figures may vary slightly by year and market)
Torque Estimated:
Approximately 23-25 Nm (specific figures may vary slightly by year and market)
Fuel Type:
Unleaded gasoline
Ignition System:
Electronic Ignition (CDI or similar)
Cooling Method:
Air-cooled
Instrumentation:
Analog tachometer and speedometer, fuel gauge, odometer, trip meter, indicator lights (may vary slightly between Aquila and Comet).
ABS Availability:
ABS was typically not a standard feature on these models during this period, but may have been an option in certain markets. Manual will detail if applicable.
Charging System:
Standard 12V electrical system with alternator/stator and battery for ignition and accessories.
Oil Change Interval:
Typically every 3,000 - 5,000 km (1,800 - 3,000 miles) or 6 months, refer to manual for exact schedule.
Spark Plug Replacement:
Recommended at 10,000 - 12,000 km (6,000 - 7,500 miles) intervals, check manual for specific type and gap.
Chain Maintenance:
Regular cleaning, lubrication, and tension adjustment (check tension at 1,000 km and then every 2,000 km).
Engine Oil Type Estimated:
API SG or higher, SAE 10W-40 or 20W-50 motorcycle-specific oil (confirm with manual).
Engine Oil Capacity Estimated:
Approx. 1.7 - 2.0 liters with filter change (verify with manual).
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific recommendation).
Coolant Type:
Ethylene glycol based antifreeze, pre-mixed or concentrate with distilled water (confirm with manual).
Common Wear Items:
Clutch plates, brake pads, chain and sprockets, wheel bearings, fork seals (typical for this class of motorcycle).
Gv250 Specific Notes:
Owners sometimes report minor electrical gremlins or carburetor (on older non-Ei models) tuning issues, though Ei versions improve reliability. Regular V-twin maintenance is key.
Gt250Rei Specific Notes:
Can be susceptible to vibration-related issues if not properly maintained; emphasis on secure fasteners and fluid levels.
Manufacturer Origin:
South Korea
Gv250 Aquila Development:
The Aquila line, known for its V-twin engine and cruiser styling, has been a significant model for Hyosung, offering a more accessible entry into the cruiser segment.
Gt250Rei Comet Development:
The Comet series has been Hyosung's offering in the sporty naked and faired motorcycle segment, often featuring their signature V-twin engine.
Production Period Covered:
2009-2012 models specifically addressed by this manual.
