Forums 🚥 PiT STOP 🔧 Hyosung Technical Help Issue E.C.U hyosung gv 125cc – GV125-S EFi Reply To: Issue E.C.U hyosung gv 125cc – GV125-S EFi
Looks aftermarket , interesting! – It should be bigger and all black but for some reason the bolts are both there, so it could be an earlier type before Hyosung updated it (Yes, they are known to fail since 2001!)
Follow the plugs and check the connectors.
Also measure the bolt holes apart ie…. (0)_____40cm____(0)
I might do some upgrade version that makes sure it stays “14.5v” constant (no flactuations or droping to 13.5v) , although earlier carb models lived on 13.5V as they had way less electronics , but because you have fuel injection model with a lot of sensors , best to ensure it is 14.v in any revs
If it ever spikes above 14.8v while running = don’t ride it. That would be battery or regulator or stator on the way out (both worth together, so ie. a bad reg slowly kills the stator unit inside the flywheel crank)
Good luck though, it seems as though with the snow all over UK, put her indoors & work on it slowly.
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