This little project is slightly more hassle than I originally planned for. But at least it is expensive and ridiculous! Regardless, most of the parts I used came from amazon so I have a few links to those if you want them.

48v Motor and speed controller kit: https://www.amazon.com/gp/product/B07...

48v Charger: https://www.amazon.com/gp/product/B07...

12v Lead acid batteries:
https://www.amazon.com/MightyMaxBat...

Extra throttle : https://www.amazon.com/gp/product/B07...

Video two of this project is out! (check it out right here)
   • 1800w 48v 30mph Razer Dune Buggy Gok...  

I also have more pictures of the original kart and can answer questions. I always read the comments.