Segment:
Entry-level to mid-range sport-standard motorcycle
Competitors:
Competes with motorcycles like the Kawasaki Ninja 250, Honda CBR250R, and Yamaha R25/R3 in terms of engine displacement and intended use.
Styling:
Sporty, aggressive styling with full fairings and a streetfighter-inspired naked variant (GT250R vs. GT250).
Engine Layout:
V-twin engine configuration, offering a distinct character compared to single-cylinder competitors.
Value Proposition:
Typically positioned as an affordable yet stylish performance motorcycle.
Coverage:
Complete Factory Service, Parts Catalogue, Owner's, Servicing, Winterizing, Pre-ride Inspection
Estimated Pages:
Undisclosed (typical for digital manuals, content-rich)
Type:
Comprehensive Service and Repair Manual
Engine:
Internal combustion, cooling system, lubrication, fuel delivery, ignition, starting system, exhaust system
Transmission:
Clutch, gearbox, final drive (chain)
Chassis:
Frame, suspension (front and rear), steering, wheels, tires
Brakes:
Front and rear brake systems (disc, caliper, master cylinder, hydraulic lines)
Electrical:
Battery, charging system, lighting, instrumentation, ignition, starter, wiring diagrams
Bodywork And Fittings:
Fairings, seat, fuel tank, fenders, handlebars, controls
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain lubrication and adjustment, spark plug replacement, brake fluid changes, coolant checks, tire pressure checks
Repair:
Engine disassembly and reassembly, transmission overhaul, suspension servicing, brake caliper rebuild, carburetor tuning, electrical component testing and replacement
Troubleshooting:
Diagnostic procedures for common issues, fault finding based on symptoms, wiring diagram interpretation for electrical faults
Winterizing:
Long-term storage procedures for motorcycle components
Pre Ride Inspection:
Routine checks before operating the motorcycle
Depth:
Comprehensive from basic checks to complete engine rebuilds and electrical system diagnostics
Engine Type:
Four-stroke, DOHC, V-twin
Displacement:
249 cc (249.4 cm3)
Bore X Stroke:
57.0 mm x 48.6 mm (typical)
Cooling System:
Oil-cooled (with oil cooler)
Compression Ratio:
10.0:1 (typical)
Horsepower:
Approx. 28-30 HP (at crank, depending on specific year/market tune)
Torque:
Approx. 22-24 Nm (at crank, depending on specific year/market tune)
Fuel Delivery:
Carburetor (dual Mikuni VM26 or similar, depending on year) or Fuel Injection (later models may have FI)
Fuel Type:
Unleaded gasoline, minimum 87 octane (91 RON)
Oil Type:
API SG or higher, SAE 10W-40 motorcycle oil
Oil Capacity:
Approx. 1.7 - 2.0 Liters (including filter change)
Transmission Type:
5-speed manual constant mesh
Clutch Type:
Wet, multi-plate
Final Drive:
O-ring sealed chain, 520 pitch
Gear Ratios:
Specific ratios available in the manual, typically optimized for sporty acceleration.
Transmission Oil:
API GL-4 or GL-5, SAE 80W-90 gear oil (check specific manual for exact type)
Safety Standards:
Adheres to standard automotive safety and emissions regulations for its class and production era.
Braking System:
Dual disc front brakes, single disc rear brake. ABS availability may vary by market and model year.
Lighting:
Halogen headlamp, LED tail lamp, turn signals.
Frame Construction:
Steel trellis frame for rigidity and rider feedback.
Instrumentation:
Analog tachometer, digital speedometer, odometer, trip meter, fuel gauge, indicator lights (oil, neutral, turn signals, high beam).
ABS:
Optional or standard on certain model years/markets. The manual will detail its function and maintenance.
Charging Port:
Some models may feature a 12V auxiliary power outlet, but integrated USB or Bluetooth is unlikely on base models.
Oil Change Interval:
Every 4,000 km or 6 months, whichever comes first (typical, refer to manual for exact spec).
Chain Maintenance Interval:
Lubricate and adjust chain every 800-1,000 km.
Spark Plug Replacement Interval:
Every 8,000-12,000 km (check manual for specific plug type and gap).
Brake Fluid Flush Interval:
Every 2 years or 24,000 km.
Engine Oil Spec:
SAE 10W-40, API SG or higher.
Coolant Spec:
Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio).
Brake Fluid Spec:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Points Of Concern:
Carburetor synchronization issues (if carbureted), minor electrical gremlins, clutch wear, valve clearance adjustments, potential for oil leaks in older models if not properly maintained.
Manufacturer:
Hyosung Motors & Heavy Industries (South Korea)
Introduction Period:
The GT250 platform was introduced in the mid-2000s, evolving from earlier Hyosung designs.
Production Years:
Production spans from the mid-2000s to the present, with periodic updates and variations.
Manufacturing Origin:
South Korea
