Chinese ATV 4x4 300 Feishen (AKA FA-D300) Rough Idle
Channel: Nick Douglas
Date: 2022-05-11

ATV Runs fine when you're on the throttle, but won't hold the idle without dying. Re-starts fine when warm. On a cold start it needs the throttle held open until warmed up. Sounds like a pinging coming from engine at idle, could be crank bearing, maybe the piston rings?? I have no idea really.
Oil is clean, always used full synthetic. Other fluids are in good condition. Fuel gauge doesn't work. Has almost brand new tires.