Reply To: GD250N – Hanging Revs and Stalling when Throttle opened quickly
Get the spark plug out , when you can and show us the colours, but try again with a fresh CR8E plug only , check if the injectors work properly
You may possibly misfire due to poorly injector? (Something similar in this topic, but it was the injector in the end)
Voltage regulator seems to be working OK for now , so keep an eye on it. Idling at 13.8V is not bad , it’s good. 14.5V should be the max , if it spikes beyond 14.8V i would replace it as EFi ECU doesn’t last very well running too high due to delicate electronics inside. A carb bike will handle 15V but it won’t like it long term.