Reply To: GD250N – Hanging Revs and Stalling when Throttle opened quickly
Fuel Pump could be #1 suspect and also its Relay. But the pump for that bike needs to maintain some good presure as the injectors could only spray as quick as they can based on ECU timings . The ECU won’t tell you if the pump is faulty (if its still running), it can only trigger it on or off.
It brings us to the injector being the next domino to fall. I’d try to clean the injector but be ready to replace it.
Ignition coil = Remove the HT Plug Cap (unscrew it, don’t pull it off) ==> Test only the ignition coil for PRIMARY & SECONDARY resistance. Tell us the values. Make sure the coil is cold.
HT Cap on its own = Measure the wire and the spark plug tip inside ==> Tell us if its 5,000 , 20,000 or 50,000 ohms.
(All OEM caps can sometimes be the reason there is sparking issues , but rarer on a GD as it’s not spoken about as much)