My guess is it's a late 1990s-early 2000s go kart. Most of my karts use a brake rod and band brake and can lock up the rear axle which as we know is not ideal for control. To maintain the effectiveness of your disc and pads, keep oil and grease away from the brake assembly--no small feat as they are in close proximity.
As Pancho said it doesn't really matter what it is. Most people rightly want their go kart identified to help them determine value but mostly they want to know what it is to be able to get parts for it. Luckily, most of these fun karts/yard karts or even the vintage rear engine karts of the late 1950s and onward will use a commonality of mostly generic parts.
In the pdf I linked above, these karts used a solid steel 1/4" rod on the brake side and about a 2/3rd length rod on the throttle side, the rest being flexible cable to connect to the governor/carburetor linkage. This is a durable setup for offroad purposes and for passengers that put their feet on the linkages. A cable setup would eventually get damaged by contact especially if it lies outside the frame rails.