40 years ago, on the farm, a brother and myself built a go-kart with a honda305 scrambler engine! 4 speed and all. Some playing with the gearing, we decided that it was safe and cool to keep it below 100. So we geared it to top out at 85 mph.
It did this in less than an 1/8 mile and beat many muscle cars--thru the 1/4!!
Can you imagine what it is like for a 17 year old to be inches in front of an engine turning 12,000rpm at 85, and have a muscle car blow past you about 115??? ( after the finish line).
This cart was nothing like the video of course but it was a wheels up launch, banging gears fun!!
We had it over 120 the first run out before the gearing change, because it was trying to get air too often.
Then we put brakes on it.

The deputies were watching for us too.