What front calipers do I need for this kart?

I have no info on this frame, no numbers on the frame other than the kic90 stamp. I believe it is a Emmick Express. I’m not very smart and new to karting, so I don’t understand what I am shopping for, but I need to find front calipers, or a whole kit that will fit on the kart. I am frankensteining a motorcycle engine and think it will be necessary to stop at 100mph. I am concerned with the clearance because the wheels only leave an inch or two between the disc and wheel. Unless they are on backwards, which is possible ha. Thanks, any help is very appreciated.