My first ride was an old snapper riding mower we got from our aunt. At first we set it up much as original with a vertical shaft engine and 5 speed transmission. Later on we put a 5hp briggs on it with a centrifical clutch. We rode it like that for probrobly 6 years or so. Then when I was 10 we moved to the country and the old setup wasnt cutting it for off road trails. We got a brand new 5hp briggs fun power and torque converter for christmas. We also lowered down the seat and steering wheel for better handling. We rode it like that for another few years before it couldnt take the beatings anymore. The front spindles kept breaking off and the frame was folding so we took it apart and that was the end of that. The parts made their way onto other projects. I still have the old briggs on my wagon and the fun power on my cat and the tc on my mini trike. also have the wheels and clutch on another gokart they are nearly dead but still going after almost 30 years. Also check out my Super bronc we adapted on a 5 speed transaxle somehow. I dont remember how it was setup but it worked ok. We also tried the bronc wheels on the kart for a bit but it didnt work to well with the gear ratio that was on it. Had a ton of fun with that kart. One time we even built a wooden body for it I thought we took a picture but iv never been able to find it.