for some unnone reason I really want to drive those go karts and I want to know is there a series i can download to get them?
There is no official go-kart mod just yet, but looking at the early renders from pre-beta, we can look forward to some in the future. I personally don't think we will see them for a while, but that doesn't bother me. I just want to add that I am a fan of the system ISI are using to develop rF2. I would much rather see the development last longer than expected, than see an unfinished product that has become oh so familiar with modern gaming.
I know what you mean I would love it if they stayed in beta for 3 years if that meant a perfect game so far they are doing very well
you could try the go karts and tracks for rf1. only recently discovered them myself, do as a good alternative for now. http://www.rfactorcentral.com/detail.cfm?ID=Rotax Max Challenge
rF2 has a kart mod already. Not a fan of Karting so can't comment http://isiforums.net/f/showthread.php/4475-Virtual-Karting-E-kart