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Forum Archive: Thanks for 15+ years of posts! Boards are now read-only. For mechanical troubleshooting, download official factory manuals here. If yours is missing, let us know. Our team is focusing entirely on improving the parts store to keep riders on the road!
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    • #557
      ♠️ M77
      Keymaster

      Hyosung 650cc V-Twin Master Resource

      Welcome to the complete documentation archive for the Hyosung GT650 (Comet/R/S) and GV650 (Aquila/Avitar). These 650cc machines are the powerhouses of the Hyosung range, featuring the iconic 90° V-Twin DOHC engine. Whether you are synchronising carburettors or diagnosing a Delphi/Denso EFI system, these permanent direct links provide the official data you need.

      650 Series Generation Guide

      Identifying your specific 650 model is critical for correct electrical and fueling maintenance. The GT and GV series evolved through several major technical phases:

      • Carburetted (2004–2008): Features dual Mikuni carburettors and the classic “silver” engine finish.
      • Gen 1 EFI (2008–2011): Transition to Fuel Injection. Uses the “S&T” or “Mitsubishi” marked systems with a green LCD dashboard on GT models.
      • Gen 2 EFI (2012–2018): Features a major visual facelift (RC for Sports, P for Naked) and the upgraded Denso/Delphi ECU systems.
      • 2024+ GV650 ABS: The latest revival (GV650PJ/PC) featuring full LED electronics and ABS. (Manuals pending; see specs link below).

      Technical Note: The 650 engine produces approx 79hp (Carby) to 74hp (EFI) and requires 10W40 semi-synthetic oil (~3.0L with filter). For 2024+ models, visit our GV650 ABS Wiki & Specs Page.


      🛠 WORKSHOP SERVICE MANUALS


      📕 OWNERS HANDBOOKS


      Safety Notice: Ensure you are using the manual that matches your ECU type (Mitsubishi, Delphi, or Denso) to avoid electrical damage. If you have documentation for the 2024+ GV650 ABS models, please contribute by commenting below. All links are permanent mirrors hosted on the HyoRiders servers.

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