EFi to carby conversion – Hyosung GV250 2009
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Bike Model = : Gv250
Hello. I’m new here, and greetings to everyone. I’ve decided to do a carby conversion on my 2009 GV250 due to an ECU issue. I’ve replaced the flywheel, CDI module, and ignition coil, but I’m unsure about replacing the stator, and I don’t know the operating voltage of the CDI module (AC or DC). I would be very grateful if you could inform me about this. If anyone here has done an EFI carby conversion before, I would appreciate it if they could share their knowledge. Thank you in advance for your answers.
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Replace the stator to the older 12-pole version
The EFi 18-pole stators never worked on carby flywheels as they use different timing dots. Next get a GV Harness (carb model GV250) and put carbs.
Your next trouble is to get a carb model GV tank + GV vacuum pump + Tank Tap = there is no way to use the Electric EFi pump inside the EFi tank on a carb model.
This should help hopefully.
There is fuel line diagram tutorial on this forum and another tutorial on how to carefully insert the airbox – I have no advise on running Pod-filters and strange chinese-clones or Keihin USA carbs because it will be a frustrating experience for you, you have to be experienced to do this kind of work and i would rather advise on using the OEM carbs and OEM airbox.
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First of all, thank you for your interest and comment.
I’m doing repairs in my own hobby workshop. Work on things like the intake manifold and carburetor isn’t a problem. We’ll be doing the wiring. I’m not a novice in this kind of work, but what I really want to know is whether the CDI module is powered by DC or AC. That’s the key point. I’ve already obtained the necessary flywheel for the carburetor. My existing stator is in good condition and new, and I don’t want to replace this expensive part. Because when I examined it, the EFI and carby stators have 3 AC outputs, and there’s no extra output for the CDI. This almost certainly confirms that the CDI module is DC, but I still felt the need to ask because I don’t have much knowledge about Hyosung.
I don’t speak English very well. Please excuse any grammatically incorrect sentences.
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Good question in regards to AC/DC. It will be DC for the GV as anything AC produced by the stator will go to the regulator anyway, though the pulse trigger on the stator goes directly to the CDI, so I expect that a CDI being pre-programmed to read certain timing pulses as the flywheel spins.
I can’t remember but i strongly suspect we may not get a full output of the AC wires as diameter of the 12 pole stator is different to the EFi 18 pole version. This was experienced on the 650cc where the later models required a full flywheel change as the diameters changed by a few mm!
I think you will surprise us as most riders don’t like go in to the abyss like we do haha , they swap the whole thing and be done with it.
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