[Download] Hyosung GT125 & GT250 (Comet/R/RC) – Service Manuals & Owner’s Books

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Hyosung GT125 & GT250 Series Resources

The Hyosung GT series is the most popular range in the lineup, spanning the naked GT125/250 Comet, the faired GT125R/250R, and the modern RC/P facelifts. As these bikes are very common across the UK and EU, we have preserved these official workshop manuals and owners books to ensure access for the community.

Model Identification & Technical Data

Whether you are tuning carburettors on a Gen 1 silver-engine model or diagnosing a Delphi EFI system on a newer black-engine 250cc, identifying your generation is key:

• GT125/250 (1998–2008): Silver engine, Mikuni Carbs, “Old Shape” (Gen 1).
• GT125/250 RC & P (2009+): Black engine, Facelifted bodywork, Carburetted or EFI.
• EFI Models (2008+): Features an O2 sensor in the exhaust downpipe and 28hp DOHC V-Twin engines.
• Maintenance: All models feature the iconic 75° V-Twin DOHC 8-valve architecture.

For more details, see our Pre-2009 (Gen 1) Wiki or the Post-2009 Facelift Gallery.

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Carburetted (Carby) Models

⬇ OWNER’S MANUAL – GT125/250 [Gen 1]

⬇ MANUAL – GT125/250 [Facelift & Hybrid]

Electronic Fuel Injection (EFI)

⬇ EFI SERVICE MANUAL – GT250 & GV250

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Need Help? If you have technical questions, please visit the Technical Help Forum.

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