@Franco wrote:
…and i want somthing that will good enuff for racing after i get practice in.
That depends on what classes are offered at the track(s) where you would be racing. You’d need to buy a kart that was capable of meeting the class requirements. If you’re looking at TAG, then basically you have a handful of engines from which to choose (go to tagracing.net for the complete list… the Parilla Leopard and Rotax FR125 are the most common in these parts, with some Motori Sevens and PRD Fireballs as well, plus there’s a lot of talk about the new crop of 4-stroke TAG engines), and the tech rules for club racing and the CSC are at coloradokartracing.com. The bigger task is getting the driver/mechanic “good enuff for racing.”
The trick about telling you “what to look for” is that every kart is a slightly different package. My advice would be to get whatever fits your budget and learn how to drive and maintain it. Many modern chassis have most of their basic features in common. The main thing is to avoid getting an “ugly duckling” chassis that you can’t get certain parts for, but there are a lot of parts that are pretty much interchangeable. You’d probably want a 50 mm axle. You’d probably have to replace some parts off the bat, like the chain and sprockets, and find a seat that fits you.
Karts were meant to be driven hard, and no two used karts have the same history. Even a new-looking, shiny kart can be crashed or bent. On a used kart, look for cracked welds, tubing that’s flat-spotted on the bottom or bent, and signs of neglect. Pick up the front end of the kart by the center of the front bumper, and the front tires should lift off the ground at about the same time if the chassis isn’t twisted. Spin the rear axle to see if it turns smoothly (binding could indicate a bent axle or toasted bearings). See if the seller would be willing to meet you at the track for a test drive… At the very least he should start the engine for you!
There are plenty of n00bs besides me who have gone through this exercise recently and posted questions here. You’ll need a means for transporting a kart, tools, spares, safety equipment, the list goes on and on. Still, for getting into honest-to-goodness 4-wheeled motorsport, karting has got to be the best bang for the buck.