Restoring a go kart from the 1960s , flat body. Doing total restoration, everything was junk on it except the frame. Putting a 6.5 on it. Trying to figure out best axle/gear/tires sizes to go with it. It had a 5 hp with a 33” 1/2” axle on it with an 84t sprocket and a 12t clutch. Cant find any axles that size so wondering if a 34” axle and a 72t sprocket with a 12t clutch would be good. The old tires were 4.10/3.50-6 tires with decent tread. Bigger than the fronts. Fronts had slicks. Does that sound like a good combo for the rebuild ?
