Here is a simple plug n play kit. Flip up the seat and install is less than 5 minutes. the only other mod is trim off the plastic on the bottom of the seat as pictured for easier install (can be done without doing that).
Drift Go Kart Build Part 2 40V Razor Ground Force
Razor Crazy Cart XL-36V Electric Drifting Go Kart, Variable Speed, Up to 14 mph (23km/h), Drift Bar for Controlled Drifts, Adult Size Fun
Razor Crazy Cart XL: Drift Scooter 36V
3 Essential Crazy Cart Mods.
Universal Parts Motor Compatible with Razor Crazy Cart XL (36V, 500W) : Sports & Outdoors
3 Essential Crazy Cart Mods.
XL TAXI GARAGE Crazy Cart (STAGE 5)
Razor Crazy Cart Fans
Razor Presents: The all new CRAZY CART XL!!! [HD]
Crazy Cart 36V Battery Upgrade – TAXI GARAGE
The Razor Crazy Cart XL will give you back the enjoyment you had as a kid. The ultimate drifting machine just grew up. In response to the overwhelming demand for an adult sized version of the award-winning Crazy Cart, feast your eyes on the Razor cart XL: a full-size, high-powered drift cart for the kid in all of us. With a high-torque motor and steel frame, this machine is built to last. The kids crazy cart is designed to support riders of up to 240 lbs.
Razor Crazy Cart XL 36V Electric Drifting Scooter RZ-CCXL
This runs your EXISTING 36 VOLT MOTOR IN 48V--50% more power all around. Yes our connector only has 3 pins, I know this.
Razor Crazy Cart XL Controller 48V volt Performance Overvolted Speed Controller
Razor E200, E300, MX350, and Pocket Mod Variable Speed Kit