A stupid project I want to do is make a kart/mini cycle car with

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A stupid project I want to do is make a kart/mini cycle car with a bike engine, cuz revving to 15k going 60+ on a kart sounds like a blast. But I want to mount the drive package to the front but still have it rwd because 1) mounting it to the back is too easy so that's no fun and 2) weight up front means less wheelie.
I could run a long ass chain through a conduit but that would be an absolute pain. I toyed with how to adapt the chain drive to a driveshaft system with bevel gears as a ring and pinion but it would also probably be a pain to get it right and reliable. Then I saw these things, and I thought they would be awesome. However, they're generally rated for less than 2hp and 2k rpm, which is not going to work at all. Does anyone make something like this or better that can handle the power and speed? Remember it's going to be a janky little kart so a big car diff would be way too much.