Reply To: Hyosung GT250R – Intermittent FI light
You will need to disconnect the neutral sensor to see if that takes the light away ? = If yes, then issue is with the neutral sensor, it would be wise to replace with a correct one as Hyosung makes various neutral sensors. Depending on the year of your bike. The “carb models” have 1 dot , and EFI models have 6 or 5 dots because the ECU reads what gear you are in until you circle back to neutral status.
Take the fuel pump out , and see if the strainer is OK = or post pictures here ?
Otherwise, the switching relay is needed (it is better than a simple 30A fuse) , like what you see at this store.
Usually cuts or bogging issues tend to be based off the fuel pump, if need be, it might need a new one. It happens (especially old pumps start to show their age and don’t perform as well as they did in their prime)
Disconnect the battery for 24hrs , and follow the service manual on this forum (manuals section) = > trick the ECU to give you a code and tell us what it is.
As this is ongoing, keep us posted , we shall get to the root of it.
Fi (not F-One) , usually is pump , ecu , injectors.
In the meantime, go to halfords and only , i mean only get this product exactly (ignore the sales guy) and pour the whole thing inside your tank (whole bottle) , as this will be an aggressive mix to your E5 fuel. This stuff should make its way to your injectors and start cleaning them out. I highly trust it.