Why yes, I know all about them since they were originally made for Sears and then they got cancelled. Sears like to have specials made so you would have to come back to them to get the parts. The crankshaft was 1/2" longer than standard. Standard being 2.297 They also wanted 5mm pitch and most racing enduro karts were using 8mm. Again Sears was into parts and you would have to go back to them for the parts - belt, wheel, clutch, engine. Some crappy designs were the axle pulley was PLASTIC and it was formed into the wheel hub along with the brake and that drive wheel was also plastic--you getting the picture. They had a lot tied up in tooling and it was a little late to change now so they were sold them as promotional karts to anyone that wanted their name on them for give aways at a new gas station or what ever. They sold lots of them since we did more than 40,000 clutches and Noram (our friendly competitor in Milwaukee also made them a clutch for the same application --different story but just as good.
There isn't enough room on the kart for a t/c conversion.
If it was my kart I would try and redesign it and get away from the belt drive. Yes, we still have the clutches for it but the wheel is the weak point.