🏷️ Basic Information

Make:

Hyosung

Model:

GV250 Aquila

Year:

2015

Market Segment:

Cruiser Motorcycle

Vin Code Prefix:

8G6

👋 Introduction

Positioning:

The Hyosung GV250 Aquila is positioned as an accessible entry-level cruiser, offering classic styling and comfortable ergonomics at a competitive price point.

Competitors:

Competes with models such as the Honda Rebel 250, Yamaha V-Star 250, and Kawasaki Vulcan S (though the Vulcan S is a larger displacement).

Styling:

Classic cruiser design with a low seat height, swept-back handlebars, and chrome accents.

Engine Layout:

V-twin engine providing a distinctive character and torque delivery.

Ride Comfort:

Designed for relaxed cruising with forward-set footpegs and an upright riding posture.

📋 Manual Details

General Coverage:

Comprehensive coverage of all maintenance, troubleshooting, and repair procedures for the 2015 Hyosung GV250 Aquila.

Specific Systems Covered:

Engine, Fuel System, Ignition System, Transmission, Clutch, Chassis, Suspension, Brakes, Electrical System, Lighting, Instrumentation, Bodywork, Troubleshooting, Periodic Maintenance.

Estimated Page Count:

Approximately 250-350 pages (typical for a service manual of this scope).

Type:

Service Manual / Repair Manual

Language:

English

Format:

PDF (Printable and Searchable)

📖 Manual Coverage

Engine Mechanical:

Detailed diagrams, specifications, and procedures for cylinder head removal/installation, piston and ring replacement, crankshaft and connecting rod service, valve timing, and cylinder boring.

Fuel System:

Carburetor adjustment, cleaning, and rebuilding; fuel pump operation; fuel tank maintenance; fuel line routing.

Ignition System:

Spark plug specifications, ignition timing adjustment, CDI unit testing, coil resistance checks.

Transmission And Clutch:

Gearbox disassembly/reassembly, clutch lever adjustment, clutch plate replacement, transmission oil specifications and change intervals.

Chassis And Suspension:

Front fork servicing and oil replacement, rear shock absorber adjustments, steering head bearing maintenance, swingarm bearing checks.

Braking System:

Brake fluid specifications and bleeding procedures, caliper inspection and service, brake pad replacement, disc rotor inspection.

Electrical System:

Wiring diagrams, battery maintenance, charging system (stator and regulator/rectifier testing), starter motor operation, fuse box layout and function.

Lighting And Instrumentation:

Headlight adjustment, bulb replacement, taillight and turn signal service, speedometer and tachometer troubleshooting.

Routine Maintenance:

Oil and filter changes, chain lubrication and adjustment, brake system checks, tire pressure monitoring, air filter cleaning/replacement.

Troubleshooting Guides:

Diagnostic flowcharts for common starting issues, running problems, electrical faults, and braking system malfunctions.

Repair Procedures:

Step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly.

Technical Specifications And Tolerances:

Precise measurements, clearances, torque values, and resistance readings required for accurate repairs.

Depth Of Information:

High. Covers from basic rider maintenance checks to complex engine and electrical system overhauls.

📊 Manual Specifications

Digital Format:

PDF

Searchability:

Text-searchable for quick information retrieval.

Image Resolution:

High-resolution for clear diagrams and images.

Binding Type:

N/A (Digital PDF format)

Paper Type:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, 4-stroke, 8-valve, SOHC V-twin

Displacement:

249 cc (249.4 cm³)

Bore X Stroke:

57.0 mm x 48.8 mm

Compression Ratio:

10.0:1

Horsepower:

Approximately 22.7 HP (16.9 kW) @ 8000 RPM (Manufacturer Claim)

Torque:

Approximately 14.4 lb-ft (19.5 Nm) @ 6500 RPM (Manufacturer Claim)

Fuel Delivery:

Carburetor (typically dual Mikuni BS30)

Fuel Tank Capacity:

14.0 Liters (3.7 US gal)

Ignition System:

Electronic Ignition (CDI)

Lubrication System:

Wet Sump

Cooling System:

Liquid-cooled

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multi-plate

Final Drive:

O-ring sealed chain

Transmission Oil Type:

SAE 10W-40 API SG or higher

Transmission Oil Capacity:

1.7 Liters (1.8 US qt)

📐 Dimensions

Overall Length:

2340 mm (92.1 in)

Overall Width:

800 mm (31.5 in)

Overall Height:

1130 mm (44.5 in)

Wheelbase:

1600 mm (63.0 in)

Ground Clearance:

150 mm (5.9 in)

Seat Height:

700 mm (27.6 in)

Dry Weight:

170 kg (375 lbs)

Wet Weight:

Approximately 185 kg (408 lbs)

Front Tire Size:

90/90-18

Rear Tire Size:

150/80-15

Wheel Type:

Spoked

🛡️ Safety Features

Crash Safety Ratings:

N/A (Motorcycles are not typically rated by organizations like NHTSA or IIHS for crash safety in the same way cars are; rider protection relies on gear and rider skill).

Braking System:

Front: Dual piston caliper with disc. Rear: Single piston caliper with disc. (ABS typically not available on this model/year).

Lighting:

Halogen headlight, LED taillight, standard turn signals.

Frame Construction:

Steel double cradle frame.

💡 Technology Features

Instrument Cluster:

Analog speedometer and tachometer, fuel gauge, odometer, trip meter, and indicator lights. Basic but functional.

ABS:

Typically not equipped with ABS on this model year.

Connectivity Features:

N/A. No Bluetooth, USB, or smartphone integration.

🔧 Maintenance

Engine Oil Change:

Every 4,000 km (2,500 miles) or 6 months, whichever comes first.

Oil Filter Replacement:

At every engine oil change (coincides with oil change interval).

Air Filter Cleaning:

Every 8,000 km (5,000 miles) or annually. Replacement as needed.

Spark Plug Replacement:

Every 12,000 km (7,500 miles).

Chain Adjustment And Lubrication:

Every 1,000 km (600 miles) or after washing/rain.

Brake Fluid Replacement:

Every 2 years or as needed based on condition.

Engine Oil:

SAE 10W-40 API SG or higher (synthetic blend or full synthetic recommended for optimal protection).

Coolant:

Ethylene Glycol based, 50/50 mix with distilled water (typically a specific motorcycle coolant is recommended).

Brake Fluid:

DOT 4

Electrical Connections:

Corrosion or looseness in electrical connectors, particularly on older models, can lead to intermittent electrical faults. Regular inspection and dielectric grease application are recommended.

Carburetor Sync And Tuning:

Carburetors can sometimes require syncing or tuning to ensure smooth engine operation, especially after extended storage or mileage.

Rear Suspension Wear:

Some owners report that the rear shock absorbers may lose their damping effectiveness over time, requiring replacement or rebuilding.

Oil Filter Part Number:

Refer to Hyosung Genuine Parts Catalog or equivalent aftermarket (e.g., K&N KN-153 or HF153).

Air Filter Part Number:

Refer to Hyosung Genuine Parts Catalog or equivalent aftermarket.

📚 Vehicle History

Hyosung Motors:

Hyosung Motors Corporation (now KR Mobility) is a South Korean manufacturer that has produced a range of motorcycles, scooters, and ATVs since the 1970s, often collaborating with Japanese manufacturers in its early years.

Gv250 Lineage:

The GV250 Aquila was a significant model for Hyosung, representing their entry into the mid-size cruiser market. It has seen various iterations and minor updates over its production run.

Production Period:

The GV250 was produced for many years, with the 2015 model being part of a generation that remained largely consistent in its core mechanics.

🏆 Awards & Recognition

Model Specific Awards:

No widely recognized industry awards for the 2015 Hyosung GV250 Aquila have been documented. Its market success is more based on its value proposition.