The Driver
 
The most important part of the team has to be the driver.  No matter how fast your kart can go, if the driver doesn't have the abilities to drive it you might as well have stayed home.  More than once we were not the fastest on the track but still finished out front because our driver had the seat time it takes to learn the strategies of racing.  

I have seen so many parents put their child in a fast kart just to have them spin in the corners and finish last. I can't stress enough the importance of seat time for the driver.  We go to the track and practice three times a week and race once or twice a month, sometimes more.  We try to get at least five hours a week actual behind the wheel driving time. That is a lot of driving for an eight year old and this does not include the countless hours he spends on his racing video games. 

One last thing, and the most important, "Have Fun!"