Well, today was my first ride with my new (to me) yerf dog. Is was weird cause starts, idles but once I push the gas pedal has almost no power, I have to get off and push the go kart, then start running like a champ, good top speed but if I stop and try to run again nothing even pushing all the way the gas pedal. In the video I put a block in front of the rear tire, push the gas all the way and you can see nothing happends. In the 10sec of the video I was trying to show an oil spot in the back of the driver' seat, is coming out of the converter cover.
I hope is one of the vacuum hose which is broken. Is not the carb, cause I have a 150cc scooter and switch the carb and my scooter show no difference.