I have checked for vacuum leaks - both with propane and carb cleaner. The buggy runs alright the way it is currently but occasionally, I haven't figured out how to recreate the scenario perfectly, it wants to hesitate and sputter when throttle is applied. I'm pretty sure this is with the 140. I'm going to feel like an idiot when I realize I changed the main weeks ago just before the crash and forgot..
30mm pumper carb, 6" intake tube, UNI, straight-through muffler with maybe 13" of 1" ID header.
Here is a video of the buggy as it sits.
Video
I did go through the fuel lines and they are all oversized and wide open. I also messed with the gas cap and basically removed the check valve to ensure a vacuum in the gas tank was not causing issues.