Drain the old fuel from the tank and the bowl drain on the carb
, and replace it with 5 gallons of fresh, and a 16 ounce can of Seafoam. Leave the bowl drain open, and with a tube attached to the bowl drain, and the other end in a container, turn the key to on and let the pump flush the fuel filter and system with the new fuel. About a half gallon should be more then enough.
Start the bike and let it run for a bit and try reving it some like in the video, and then shut it off and let it sit over night, and then try it again. I'm amazed it even runs because the Pilot
circuit is usually blocked to the point of needing to completely strip the carb by this time.
It should be spitting fuel up around the needle big time as the slide rises, and fuel should be spitting out the end of the brass tube, when you roll the throttle.