Karts are way friggin expensive. You got a lot of things to deal with, and have to figure how to haul it around.
Oval is even more expensive, road course is simpler.
..oval
4 unique tires and balances, 4 tire pressures
most of the Karts in my area (the tracks we run pocketbikes on) are 5hp Briggs variations..they go about 55-60mph around tight corners. Unreal...but you'd never get me in a cage.
there are dozens of kart classes, based on weight and body/roll cvage style. We have champs, tigers, star champs, 2-stroke...there are too many
as you see in the previous picture, that is a 2-stroke kart that hauls ASS, but check the expansion chamber. there really isn't one that is decently tuned there...they all have to run the same chamber to be fair (kart racing is hugely based on being equal as possible) imagine a fat, long, tuned chamber, you could fly that kart to the moon !
most the people I know racing karts have 10,000 invested and spend 1200 per summer supporting parts, tires, crashes, bodywork. Most people have sponsors too. VERY pricey to start racing, then easier to manage long-term. lotsa rules, and if you win, expect engine teardown to look for cheats (there are a lot of cheats in karting...like anything)
it's wicked cool. I see kids racing against 60 year olds in the same races. as long as the weight fits, you race. add or remove lead weights to the frame....