Ok, this next video start with the go kart in stands with the tires in the air, the acceleration sounds almost good. The first weird thing I notice is the variator apparently is not working right, maybe needs to be replaced. At the 1:00 min. on the video I take out the stands and put the tires in the trailer floor, then the rest of the vid is "accelerating" the carb with my hand or with the pedal but nothing happends. But if I put the tires back in the air it accelerates like normal like the first min of the vid.
well definitly I'm not the best video maker, hope works.