Reply To: Bike won’t start – GV 250 EFI 2015
The fuel pump making a whirring sound is a good thing while running, it must keep running until you switch off the bike as the injectors need fast pressure fuel for injectors compared to slow fed carbs. A slight delay would cut out the bike.
The black wire , looks like a fire hazard, that’s the plug which gets power from the rectifier yes , don’t cut it, but make a very tight bandage around it using a very good electric safe black tape, so it doesnt touch anything else naked. Good excuse also to check all your other wires.
Regulator = I highly advise sending that regulator in the bin. It is the #1 most dangerous thing on the bike, as if it ever goes funny, it will smoke everything. No long term hyo owner keeps its , hence we always stress to use a trusted MOSFET Japan version , a real one.
Like this example here:
Upgrade Regulator Rectifier & Stator Magneto – Hyosung GV250 GT250 [EFi DELPHi 2011-2015]
BEFORE changing the regulator, please check your stator’s output , or show this link below to your mechanic:
Rectifier – How to Test Stator , Battery , Regulator – GT125R Carby
Hopefully the stator is OK and all you need is just a regulator upgrade. probably the most imporant electric upgrades will be “Regulator (Mosfet) , avoid many million fakes out there” + NGK HT Leads (OEM ones are rubbish) + New OEM coils (Old ones be kept in garage for emergencies) , these three along should be enough for a long road trip this summer.
As for Error codes, unplug battery for 24hrs and reconnect, then see if new errors come up and tell us the sequences of the flashing red icon.