Hyosung GV250 Specifications Carb & EFI Aquila Resources Shop

Searching for definitive Hyosung GV250 Specifications? This is the ultimate technical guide for every carbureted & EFi Aquila, from the ultra-rare 2001 models to the final 2017 Delphi editions. Compare specs, troubleshoot electrical faults, and find the essential Shindengen regulator and X-Ring chain upgrades.

Hyosung GV250 Aquila (2001-2017) – This 250cc V-Twin cruiser commands a cult following across the world. It uses the same frame, plastics, and engine core throughout its run, but saw a massive evolution from a simple cable-driven carburetor system to a complex multi-stage EFi setup. We cover every iteration—Sentec, Daewoo, and Delphi ECUs—and provide verified data to keep this iron maiden on the road.

Hyosung GV250 Specifications (Carb & EFi Models)

⚡ Engine & Performance Specifications

Engine Type: 75°/90° V-Twin, 4-Stroke, DOHC, 8-Valve (Air/Oil Cooled)

Displacement: 249 cc (Bore 56mm x Stroke 48.8mm)

Power Output (Carb): ~28 HP @ 10,500 RPM

Power Output (EFi): ~24 HP @ 9,000 RPM

Torque (Carb): 22 Nm @ 7,300 RPM

Fuel System: Mikuni BDS26 Double Carbs (Pre-2008) | EFi (Sentec/Daewoo/Delphi 2008+)

Transmission: 5-Speed Constant Mesh (Wet Multiplate Clutch)

⚙️ Drivetrain Upgrade: The GV250 uses a 520 chain stock, but we offer a Premium X-Ring Chain & Sprocket Kit. X-rings offer superior lubrication and longevity compared to standard O-rings. Our kit includes the critical front sprocket lock washer and nut that Hyosung mandates changing every time to prevent catastrophic failure!

🛠️ Chassis, Brakes & Suspension Specifications

Frame: Double-cradle Steel Pipe

Front Suspension: 41mm Telescopic Forks

Rear Suspension: Dual Shock Absorbers, Preload Adjustable

Front Brake: Single 280mm Disc with 2-Piston TCTC Caliper

Rear Brake: 130mm Drum Brake

Tyres: 110/90-16 (Front) | 150/80-15 (Rear)

🛑 Braking Upgrade: This heavy cruiser needs stopping power. We are the only UK shop offering Goodridge UK Braided Front Lines for improved feel. We also stock Rear Drum Shoes and Replacement Rear Cables.

📏 GV250 Dimensions & Weight Specifications

Dry Weight: ~172 kg

Seat Height: 700 mm – 711 mm

Fuel Capacity: 14 Litres (Carb & EFI models)

Wheelbase: 1,500 mm

The Great Divide: Carb vs. EFi (2001-2017)

While body plastics are the same, the mechanics changed dramatically. You cannot interchange many electrical or fuel components:

Carb Models (01-08): Use a vacuum fuel pump, a fuel tap on the tank, mechanical speedo/odo, square handle switches with a manual light switch/choke lever, and 12-pole stators. Exhausts are twin pipes with no O2 sensors.
EFi Models (08-17): Use an in-tank electric fuel pump, digital speed sensors on the fork leg, LCD fuel/odo displays, curved handle switches, and 18-pole stators. Exhausts are large 2-into-1 bazookas with Lambda (O2) ports.

EFi Evolution: Sentec, Daewoo, & Delphi

Not all EFi models are the same. Hyosung constantly changed suppliers, leading to complex compatibility issues:

2008-2009 (Sentec ECU): First EFi dash with an FI light. Uses specific “pig-tail” wiring connectors.
2009-2012 (Daewoo ECU): A short-lived, highly sensitive system where ECUs are nearly impossible to find today.
2012-2015 (Delphi ECU): More reliable, but uses specific “small plugs” on the harness that changed in 2016.
2016-2017 (Final Delphi): Features waterproof connectors, larger regulator plugs, dual O2 sensors, and “lights-off” starting logic to save battery strain.

The HyoRiders Maintenance Checklist & Electrical Fixes

Stator and Regulator failures plague every year of the GV250. We help riders with better fixes:

⚡ Carb Model Electrical Fix: Carb stators are 12-pole. Use our specific Aftermarket Carby Stator and the dedicated Upgraded Regulator (it has a direct plug, unlike the EFi pigtails).
⚡ EFi Model Ultimate Fix: The stock OEM regulators are junk, causing stators to burn out. We offer a bundle with a new stator and a **Genuine Japan MOSFET Regulator** (the global gold standard for heat stability and reliability). EFI Sentec/Daewoo Kit | EFI Delphi Kit (Small Plug).
🛠️ Carb Airbox Warning: Like the 125, the intake boots are fragile. Check our guide How to Remove the Airbox.

Community Resources & Owners Club

🛍️ SHOP ALL GV250 CARB PARTS
🛍️ SHOP ALL GV250 EFI PARTS
💬 JOIN THE GV250 OWNERS FORUM (Manuals Available)

📸 Owner Spotlight: Do you own a rare 2001 Spoke Wheel model or a final-year 2017 Delphi? Help the community by sharing photos and experiences in the technical forums!